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Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCs)
ECM SPN 84, Wheel-Based Vehicle Speed - MID 128 PID 84
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 9 ° Abnormal updaterate
Missing signalfrom VECU
° Engine derate ° SAE J1587 data link vehicle speedmessage does not exist, (VECU error)
° VECU
FMl10 Abnormal rate of
change
Vehicle speeddeemedinaccurate byVECU
° MIL illuminated ° Vehicle speed sensor (\/SS)° VECU
FM|13 Out of calibration No vehicle speedavailable to VECU
° MIL illuminated ° Vehicle speed sensor (VSS)° VECU
FM|19 Received networkdata in error
Vehicle speeddeemedinaccurate byVECU
° MIL illuminated ° Vehicle speed sensor (VSS)° VECU
ECM SPN 91, Accelerator Pedal Position 1 - MID 128 PID 91
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 9 Abnormal updaterate
Missing signalfrom VECU
° N/A ° SAE J1587 data link pedal informationnot available
FMI13 Out of calibration Pedal notconnected toVECU
° MIL illuminated ° Accelerator pedal sensor fault
FM|10 Abnormal rate ofchange
Pedal positiondeemedinaccurate byVECU
° MIL illuminated ° Accelerator pedal sensor fault
FMI19 Received networkdata inerror
Pedal positiondeemedinaccurate byVECU
° MIL illuminated ° Accelerator pedal sensor fault
ECM SPN 94, Engine Fuel Delivery Pressure - MD 128 PID 94
Type of FMI Description: Fault Condition: Possiblefault: Symptoms:
Possible Cause:
FMI 3 ’ Voltage abovenormal, or shortedto high source
Low fuel pressuresensor signal linevokage
° NIA ° Damaged contacts in hamess° Faulty fuel pressure sensor° Open circuit.
FM' 5 ° Current belownormal or opencircuit
Low fuel pressuresensor signal line
voltage
° N/A ° Damaged contacts in hamess° Faulty fuel pressure sensor
31
Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCS)
FMI 7 Mechanical systemnot respondingproperly
° Drop in fuelpressure
° Engine derate ° Clogged fuel filter° Faulty fuel pressure sensor° Leaking fuel line or fitting° Poor fuel pump response
FM|13 Out of Calibrationinvalid value
° Sensor indicates a ° N/A ° Vlhring hamess° Faulty fuel pressure sensor° Clogged fuel filter
FM|15 Data valid but abovenormal operatingrange-Least severelevel
invalid value
° Sensor indicates a ° N/A ° Vlhring harness°
Faulty fuel pressure sensor
FMI17 Data valid but belownormal operatingrange-Least severelevel
invalid value
° Sensor indicates a ° N/A ° \Mring harness° Faulty fuel pressure sensor° Clogged fuel filter
FM|18 Data valid but belownormal operatingrange -Moderatelysevere level
° Drop in fuelpressure
°Engine derate ° Clogged fuel filter
°Faulty fuel pressure sensor
° Leaking fuel line or fitting° Poor fuel pump response
ECM SPN 97, Water in Fuel Indicator- MID 128 PID97
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Water in fuel isindicated
° Uneven running° Engine stalling
° Water in fuel
FMI 3Voltage abovenormal, or shortedto high source
° N/A ° Undetected waterin fuel supply
° Uneven running° Engine stalling
° Open circuit
FMI 4Voltage belownormal, or shortedto low source
° N/A ° Undetected waterin fuel supply
° Uneven running
° Short to ground° Open circuit° Faulty sensor
ECM SPN 98, Engine Oil Level- M D 128 PID 98
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 1 Data valid but above ° Critically belownormal operationalrange
range
° Red Stop oryellow Checklamps illuminated
dependent ofseverity
° Low oil level leakage° Critically low oil level
32
Engine Control Module (ECM) Diagnostic TroubleG' ° “p 28 c ode s (m o s )
FMI 4Voltage belownormal, or shortedto low source
Short Circuit -Positive side
Oil level can notbe measured
Engine Oil Level (EOL) sensor failure
Faulty hamess
FMI 5 Current belownormal oropencircuit
Short Circuit +, °Positive side
Open Circuit +,Positive side
Open Circuit-
Negative side
Oil level can notbe measured
Engine Oil Level (EOL) sensor failure
Faulty harness
FMI18 Data valid but belownormal operatingrange -Moderatelysevere level
Moderately belowrange
Critically belowrange
Red Stop oryellow Checklamps illuminateddependent ofseverity
° Low oil level leakage
Moderately low oil level
ECM SPN 100, Engine Oil Pressure - MID 128 PID 100
Type of FMI Description:fault:
Fault Condition: Possible Possible Cause:Symptoms:
FMI 1 Data valid but belownormal operationalrange
Critically belowrange
Engine derate
Low pressureRed Stop lampilluminated
Oil leakageBroken oil pump
Clogged oil system
FMI 3Voltage belownormal orshortedlow
Short Circuit +,Measuring line
Open Circuit,Ground line
Oil pressureshows 0 in thecluster, engine isrunningYellow Checklamps illuminated
Engine Oil Pressure (EOP) sensorfailure
Faulty harness
FMI 5 Current belownormal or opencircuit
Open Circuit +, 5V °Supply line
Short Circuit -,Measuring line
Open Circuit,Measuring line
Oil pressureshows 0 in thecluster, engine ismnning
Yellow Checklamps illuminated
Engine Oil Pressure (EOP) sensorfailure
Faulty hamess
FM|13 Out of Calibration Sensor indicates ainvalid value
Oil pressureshows 0 in thecluster, engine ismnning
Engine Oil Pressure (EOP) sensorfailure
Faulty harness
FM|15 Data valid but abovenormal operatingrange -Least severelevel
Sensor indicates ainvalid value
Oil pressureshows 0 in thecluster, engine isnlnning
Engine Oil Pressure (EOP) sensorfailure
Faulty harness
FMl17 Data valid but belownormal operatingrange -Least severelevel
Sensor indicates ainvalid value
Oil pressureshows 0 in thecluster, engine isrunning
Engine Oil Pressure (EOP) sensorfailure
Faulty hamess
33
Engine Control Module (ECM) Diagnostic TroubleG'°”'° 28 codes (p ro s )
ECM SPN 102, Engine Intake Manifold 1 Pressure - MID 128 PID 102
Type of FMI Description:fault:
Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 2 Data erratic,intermittent orincorrect
Intake ManifoldPressure Sensoroutput is too highor too low
°Engine derate
° MIL lampilluminated
Faulty harness
Intake Manifold Pressure sensor
FMI 3Voltage abovenormal, or shortedto high source
A short to batteryin the meteringcircuit
An open in theground circuitof the IntakeManifold PressureSensor
° Engine derate° MIL lamp
illuminated
Faulty hamess
Hamess connectors
Intake Manifold Pressure sensor
FMI 5 Current belownormal or opencircuit
A short to groundin the hames s
Anopen in the 5volt supply circuit
An open in themetering circuit
° Engine derate° MIL lamp
illuminated
Faulty hamess
Hamess connectors
Intake Manifold Pressure sensor
FMl12 Bad intelligentdevice orcomponent
Intake ManifoldPressure sensoroutput is too highSensor indicatesa invalid value
° Engine derate° MIL lamp
illuminated
Faulty harness
Intake Manifold Pressure sensor
FM|13 Out of Calibration Sensor indicatesa invalid value
° Engine derate° MIL lamp
illuminated
Faulty hamess
Hamess connectorsIntake Manifold Pressure sensor
FMI14Special instmctions Intake Manifold
Pressure sensoroutput is too low
Sensor indicatesa invalid value
°Engine derate
° MIL lampilluminated
Faulty harness
Intake Manifold Pressure sensor
Inlet air leakage
FMI15 Data valid but abovenormal operatingrange -Least severelevel
Intake ManifoldPressure sensoroutput is too high
° Engine derate° MIL lamp
illuminated
Faulty hamess
Hamess connectorsIntake Manifold Pressure sensor
FMI17 Data valid but below °normal operatingrange-Least severelevel
Sensor indicatesa invalid value
° Engine derate° MIL lamp
illuminated
Faulty harness _Hamess connectorsIntake Manifold Pressure sensor
34
Engine Control Module (ECM) Diagnostic TroubleG'°“" 28 codes (m o s )
ECM SPN 103, Engine Turbocharger1 Speed - MID 128 PID 103
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 0 ° Data valid but abovenormal operationalrange
Turbochargerspeed is at least25% greater thanthe target wheel
speed for themeasured boost
° Engine derate° MIL illuminated
Miss detection
Faulty hamess
Faulty hamess connector
Turbocharger Speed Sensor
FMI 1 ’ Data valid but belownormal operationalrange -Most severelevel
Turbochargerspeed is at least25% less thanthe target wheelspeed for themeasured boost
° Engine derate° MIL illuminated
Miss detection
Faulty hamess
Faulty harness connector
Turbocharger Speed Sensor
FMI 9 ° Abnormal updaterate
Afault is logged ifthe TurbochargerSpeed Sensor
signal is lost
° Engine derate° MIL illuminated
Faulty harness
Faulty hamess connector
Turbocharger Speed Sensor
FMl15 ° Data valid but abovenormal operatingrange -Least severelevel
Turbochargerspeed is at least25% greater thanthe target wheelspeed for themeasured boost
° Engine derate° MIL illuminated
Miss detection
Faulty harness
Faulty harness connector
Turbocharger Speed Sensor
ECM SPN 105, Engine Intake Manifold 1 Temperature -MID 128 PID 105
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:Symptoms:
FMI 0 ° Data valid but abovenormal operationalrange -Most severelevel
Sensor indicates ainvalid value
° Engine derate Poor coolingExtreme running conditions
FMI 2 ° Data erratic,intermittent orincorrect
The IntakeManifoldTemperaturesensor output istoo high or too low
° Engine derate° MIL illuminated
Poor cooling
Extreme running conditions
Engine Intake Manifold sensor
Faulty harness
Faulty harness connector
Ambient Air Temperature sensor
FMI 4 ° Voltage belownormal, orshortedto low source
N/A ° Difficult to start incold climates
° Minor cold enginesmoke
° Engine derate’ MIL illuminated
Engine intake Manifold sensor
Faulty hamess
Faulty harness connector
Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCs)
FMI 5 ° Current belownormal or opencircuitt
Possible short tosensor
Difficult to start incold climates
Engine derate
MIL illuminated
° Engine Intake Manifold sensor° Faulty harness° Faulty hamess connector
FMI13 ° Out of Calibration The sensor outputis showing aconstant value
Engine derate
Minor cold enginesmoke
MIL illuminated
°Engine Intake Manifold sensor
° Faulty harness° Faulty hames s connector
FMI17 ° Data valid but belownormal operatingrange-Least severelevel
The sensor outputis showing aconstant value
Engine derate
Minor cold enginesmoke
MIL illuminated
° Engine Intake Manifold sensor° Faulty harness° Faulty hamess connector
ECM SPN 108, Barometric Pressure - MID 128 P D 108
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 2 ° Data erratic,intermittent orincorrect
BarometricPressure sensoroutput is too highortoo low
Minor enginederate
MIL illuminated
° Faulty Sensor° Faulty Engine Control Module
FMI 3 ° Voltage abovenormal, orshortedto high source
Short to battery onthe metering side
MIL illuminated ° lntemal fault in the Engine ControlModule
°Faulty Sensor
FMI 4 ° Voltage belownormal, or shortedto low source
A short to groundon the meteringside
MIL illuminated ° lntemal fault in the Engine ControlModule
° Faulty Sensor
ECM SPN 110, Engine Coolant Temperature - MID128 PID 110
Type offault:
FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 ° Data valid but abovenomial operationalrange -Most severelevel
Coolanttemperatureindicates criticallimit
Engine derate
Red Stop lampilluminated
° Extreme driving condition° Faulty coolant thennostat° Malfunctioning fan° Blocked radiator
FMI 2 ° Data erratic,intermittent orincorrect
Engine CoolantTemperaturesensor output istoo high or too low
May affectdriveability inextreme casesMIL illuminated
° Faulty Sensor° Faulty harness° Faulty coolant thermostat
FMI 4 ° Voltage belownormal or shortedlow
Engine CoolantTemperaturesensor voltagetoo low
Difficult to start incold climates
Idle mnregulationis deteriorated
MIL illuminated
° Faulty Sensor° Faulty harness
36
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
FMI 5 Current belownormal or opencircuit
° N/A ° Difficult to start incold climates
° Idle run regulationis deteriorated
° MIL illuminated
Faulty Sensor
Faulty harness
FM|1O Abnonnal rate ofchange
° Engine CoolantTemperaturesensor outputis showing aconstant value
° May affect vehicledriveability
° MIL illuminated
Faulty Sensor
Faulty hamess
FM|13 Out of Calibration ° Sensor out ofrange
° Sensor indicates ainvalid value
° N/A Faulty Sensor
FM|16 Data valid but abovenormal operatingrange -Moderatelysevere level
° Coolanttemperatureindicatesmoderate upperlimit
° Engine derate° Yellow Check
lamp illuminated
Extreme driving condition
Faulty coolant thermostat
Malfunctioning fan
Blocked radiator
FMI17 Data valid but belownormal operatingrange-Least severelevel
° Sensor out ofrange
° Sensor indicates ainvalid value
° N/A Faulty Sensor
ECM SPN 111, Engine Coolant Leve l - MID 128 PID 111
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI1 Data valid but belownormal operationalrange -Most severelevel
° Critically below
range’ Coolant level can
not be detected
° Engine derate° Red Stop lamp
illuminated° Coolant level can
not be detected
Coolant level below range°
Faulty harness
FMI 3Voltage abovenonnal, or shortedto high source
° Short Circuit +,measuring line
° Coolant level cannot be detected
° Coolant level cannot be detected
° Yellow Checklamp illuminated
Faulty harness
Faulty harness connector
Faulty level sensor
FMI 4Voltage belownormal, or shortedto low source
° Short Circuit -,measuring line
° Coolant level cannot be detected
° Coolant level cannot be detected
° Yellow Checklamp illuminated
Faulty harness
Faulty harness connector
Faulty level sensor
FMI 5 Current belownormal or opencircuit
° Open Circuit° Coolant level can
not be detected
° Coolant level cannot be detected
° Yellow Checklamp illuminated
Faulty hamess
Faulty harness connector
Faulty level sensor
Engine Control Module (ECM) Diagnostic TroubleG'°“'° 28 codes (p ro s )
FMI14Special instructions ° Sensor out of
range° Sensor indicatesa
invalid value
° Coolant level cannot be detected
° Yellow Checklamp illuminated
Faulty harness
Faulty hamess connector
Faulty level sensor
FMI18 Data valid but belownormal operatingrange -Moderatelysevere level
° Sensor out of
range° Sensor indicates a
invalid value
° Coolant level cannot be detected
° Yellow Checklamp illuminated
Faulty hamess
Faulty hames s connector
Faulty level sensor
ECM SPN 153, Engine High Resolution Crankcase Pressure - MID 128PID 153/PSID 23
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:Symptoms:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Out of range, maxvoltage, illegal
° Critically Above
Range
° Red Stop lampilluminated
° Forced idle° Engine shutdown
Piston ring blow-by
FMI 2 Data enatic,intennittent orincorrect
° Crankcasepressureindication to highorto low a value
° MIL illuminated Faulty Crank Case Pressure senor
Faulty hamess
FMI 3Voltage abovenormal orshorted tohigh source
° Short Circuit +,Measuring line
° Open Circuit,Ground line
° MIL illuminated° Yellow Check
lamp illuminated
Faulty Crank Case Pressure senor
Faulty hamess
FMI 5 Current belownormal or opencircuit
°Open Circuit +, 5VSupply Line
° Short Circuit -,measuring line
° Open Circuit,measuring line
° MIL illuminated° Yellow Check
lamp illuminated
Faulty Crank Case Pressure senor
Faulty hamess
FMI 7 Mechanical systemnot responding orout of adjustment
° Leakage detectedin the crankcaseventilation system
° MIL illuminated Faulty separator, hoses or pipes
FMI13 Out of Calibration ° Sensor out ofrange
° Sensor indicatesainvalid value
° MIL illuminated Faulty Sensor
38
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
FMI15 ° Data valid but abovenormal operatingrange -Least severelevel
° Sensor out of ° MIL illuminated ° Faulty Sensor
range° Sensor indicates a
invalid value
FMI17 ° Data valid but belownormal operatingrange -Least severelevel
° Sensor out of ° MIL illuminated ° Faulty Sensor
range° Sensor indicates a
invalid value
ECM SPN 158, Keyswitch Battery Potential- MID 128 PID 158/PSID 124
Type offault:
FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 ° Data valid but abovenormal operationalrange
° Engine ControlModule batteryvoltage too high
° N/A ° Charging system fault° Extemal charger° Engine control module (ECM)
FMI 1 ° Data valid but belownormal operationalrange
° Engine ControlModule batteryvoltage too low
° Starter will notcrank
° Charging system fault° Battery° Ground connection
FMI 3 ° Voltage abovenormal, or shortedto high source
° Engine ControlModule batteryvoltage too high
° N/A ° Charging system fault° Extemal charger° Engine control module (ECM)
FMI 4 ° Voltage belownormal, orshortedto low source
° Engine ControlModule batteryvoltage too low
° Starter will notcrank
° Charging system fault° Battery° Ground connection
FM|16 ° Data valid but abovenormal operatingrange -Moderatelysevere level
° Engine ControlModule batteryvoltage too high
° NIA° Charging system fault° Extemal charger° Engine control module (ECM)
FM|18 ° Data valid but belownormal operatingrange -Moderatelysevere level
° Engine ControlModule batteryvoltage too low
° Starter will notcrank
° Charging system fault’ Battery° Ground connection
ECM SPN 171, Ambient Air Temperature - MID 128 PID 171
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 2 ’ Data erratic,intermittent orincorrect
° Key ON,Ambient° NIA ° Faulty instrument cluster
Air Temperature» Fauny harness
message mi ssi n g
on SAE J1939 andSAE J1587 datalinks
Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCs)
FMI 9 Abnormal UpdateRate
° Key ON, AmbientAir Temperaturemessage missingon SAE J1587data link
° N/A ° Faulty instrument cluster° Faulty harness
FM|10 Abnormal rate ofchange
° AmbientTemperaturesensor signal fault
° MIL illuminated ° Faulty instrument cluster
FMI12 Bad intelligentdevice orcomponent
° Loss of SAEJ1939 data linkcommunicationbetween EngineControl Moduleand InstrumentCluster ControlModule
° MIL illuminated °Faulty instrument cluster
° Faulty hamess
FMl13 Out of calibration ° AmbientTemperaturesensor signal fault
° No ambienttemperaturecalculated byVehicle ECU
° No valid ambienttemperaturereceived byEngine ControlModule
° MIL illuminated °Faulty instrument cluster/hamess orcluster hamess connectors
FMI14 ° Special instructions ° AmbientTemperaturesensor signal fault
° MIL illuminated ° Ambient Temperature sensor signalmissing from Vehicle ECU
FM|19 ° Received networkdata in error
° AmbientTemperaturesensor signal fault
° MIL illuminated ° Faulty instrument cluster
ECM SPN 173, Engine Exhaust Gas Temperature (EGT)- MID 128 PID 173
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
‘ Exhaust GasTemperature iscritically high
° Engine derate° Poordriveability°
Regeneration isnot possible
° Faulty harness° Faulty hamess connector° Intake air leak
FMI 2 Data erratic,intermittent orincorrect
° Sensor is notrational
° MIL illuminated°
Regeneration isnot possible
° Faulty harness’ Faulty hamess connector° Exhaust leak° Intake air leak° Sensor failure
40
Engine Control Module (ECM) Diagnostic TroubleGm " 28 c ode s ( or es)
FMI 4Voltage belownormal, or shortedto low source
° Short to ground onthe metering sideofthe circuit
° MIL illuminated° Regeneration is
not possible
° Sensorfailure° Faulty harness° Faulty harness connector’ Aftertreatment control module (ACM)
FMI 5 Current belownormal or opencircuit
° Short to battery onthe metering sideofthe circuit
° Open in themetering side ofthe circuit
° Open in the
ground side ofthe circuit
° MIL illuminated ° Faulty hamess° Sensor failure° Faulty hamess connector
FMI15 Data valid but abovenormal operatingrange-Least severelevel
° Sensor out ofrange
‘ Sensor indicatesainvalid value
° MIL illuminated ° Sensor failure° Faulty harness
FMI16 Data valid but abovenormal operatingrange -Moderatelysevere level
° Exhaust GasTemperature ismoderately toohigh
° Engine derate° Poor driveability
° Faulty harness° Faulty hamess connector° Intake air leak
ECM SPN 175, Engine Oil Temperature 1- MID 128 PID 175
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:Possible Caus e:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Extreme drivingconditions
° Engine oiltemperaturecritically aboverange
° Red Stop lampilluminated
° Engine derate
° Extreme driving conditions° Engine cooling fan° Oil thermostat° Coolant system° Clogged oil cooler
FMI 2 Data erratic,intermittent orincorrect
° Engine oiltemperaturesensor indicatingtoo high or too lowa value (abnormalvalue)
° MIL illuminated° In some cases
may havean effect ondriveability
° Engine Oil Temperature (EOT) sensorfailure
‘ Faulty hamess
FMI 4Voltage belownormal, or shortedto low source
° Short circuit -,measuring line
° MIL illuminated° Yellow Check
lamp illuminated
°Engine Oil Temperature (EOT) sensorfailure
° Faulty harness
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FMI 5 Current belownormal or opencircuit
° Short circuit +,measuring line
° Open circuit
° MIL illuminated° Yellow Check
lamp illuminated
° Engine Oil Temperature (EOT) sensorfailure
° Faulty harness
FMl13 Out of Calibration ° Sensor out ofrange
° Sensor indicates ainvalid value
° MIL illuminated °Engine Oil Temperature (EOT) sensorfailure
FMI 16 Data valid but abovenormal operatingrange -Moderatelysevere level
° Extreme drivingconditions
° Engine oiltemperature ismoderately toohigh
’ Yellow Checklamp illuminated
° Engine derate
° Extreme driving conditions° Engine cooling fan° Oil thermostat° Coolant system° Clogged oil cooler ,
FMI17 Data valid but belownormal operatingrange -Least severelevel
° Sensor out ofrange
° Sensor indicatesainvalid value
° MIL illuminated ° Engine Oil Temperature (EOT) sensorfailure
ECM SPN 177, Transmission Oil Temperature - MID 128 PID 177
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Oil temperaturecritically aboverange
° Red Stop lampilluminated
° Transmission oil cooler° Coolant system
FM|16 Data valid but abovenormal operatingrange -Moderatelysevere level
° Oil temperatureis moderately toohigh
° Yellow Checklamp illuminated
° Extreme driving conditions° Engine cooling fan° Oil thermostat° Coolant system° Clogged oil cooler
ECM SPN 188, Engine Speed At IdMID 128 PID 188
e, Point 1 (Engine Configurations)-
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Engine idle speedabove desired
speed
° MIL illuminated° High engine oil
consumption° High fuel
consumption
° Engine oil entering cylinders° Leaking or faulty fuel injector
FMI 1 Data valid but belownormal operationalrange -Most severelevel
° Engine idle speedbelow desired
speed
° MIL illuminated° High fuel
consumption
° Low engine torque production° Faulty fuel injector° Low cylinder compression° Engine friction is too high
42
' i i.,
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
ECM SPN 190, Engine Speed - MID 128 PID 190
Type of FMI Description: Fault Condition: Possible Possible Cause:fault: Symptoms:
FM' 0 ° Data valid but above ° Engine is/was ° Red Stop lamp °normal operational overspeeding illuminated ¢
range -Most severelevel
Engine oil entering cylinders
Faulty crankcase oil filter° Possible engine brake engaged
causing engine overspeeding° Possible transmission downshift
causing engine overspeeding
ECM SPN 228, Speed Sensor Calibration - MID 128 PID 228
Type of FMI Description: Fault Condition:fault:
PossibleSymptoms:
Possible Cause:
SAE J1587 datalink calibrationfactor messagedoes not exist.(VECU error).
FM' 9 ° Abnormal update°
rate
° Your trip data ° Vehicle ECU
SAE J1587 datalink calibrationfactor messagedoes not exist.(VECU error).
FM' 11 ° Failure mode not °identifiable
° Your trip data ° Vehicle ECU
ECM SPN 237, Vehicle Identification Number - MD128 PSID 161
Type of FMI Description: Fault Condition:fault:
PossibleSymptoms:
Possible Cause:
FMI 2
intermittent or VIN
incorrect
° Data erratic, ° No answer from ° Yellow Checklamp illuminated
° Engine will notstart
° Datalink error° ECM°
Missing VIN inother ECM’s (commonlyvEcu , Lcrvi)
FMI 12 ° Bad intelligent ° Bad answer fromdevice or VIN
component
° Yellow Checklamp illuminated
°Engine will notstart
° ECM° Mismatched VIN sent from other
ECM’s (commonly VECU LCM)
ECM SPN 245, Total Vehicle Distance - MID 128 PID 245
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
° SAE J1587 datalink total vehicledistance messagedoes not exist.(\/ECU error).
FMI 9 ° Abnormal updaterate
° NIA ° Vehicle ECU
Engine Control Module (ECM) Diagnostic TroubleG'°“'° 28 codes (DTCS)
ECM SPN 251, Time - MID 128 PID 251
Type offault:
FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 2 Data erratic,intermittent orincorrect
Time datamessage missingon SAE J1587 andJ1939 data links.(Cluster error).Time stampfrom cluster isn’tavailable.
° N/A ° Instrument Cluster
FMI 9 Abnormal updaterate
Time datamessage didn’tarrive whenexpected. (Clustererror).Time stampfrom cluster isn’tavailable.
° N/A ° Instrument Cluster
FM|10 Abnormal rate ofchange
Soak time toolong.Time data fault,data deemedinaccurate.
° MIL illuminated°
Engine makeswarm start butcold start needed.
° Instrument Cluster
FM|12 Bad intelligentdevice orcomponent
Time and datedata missing onJ1939 data link.
° MIL illuminated ° Instrument Cluster°
Faulty harness°
Faulty hamess connector
FM|13 Out of calibration Time/date fault ° MIL illuminated ° Instrument Cluster° Faulty harness° Faulty hamess connector
FM|19 Received networkdata in error
Soaktime too long.Time data fault,data deemedinaccurate.
° MIL illuminated ° Instrument Cluster
44
l i "
Engine Control Module (ECM) Diagnostic TroubleG' °“p 28 codes ( mos )
ECM SPN 252, Date - MID 128 PID 252
Type of FMI Description: Fault Condition: Possible Possible Cause:fault: Symptoms:
rate from cluster isn’tavailable.
‘ Date datamessage missingon SAE J1587data link. (Clustererror).
F MI Q ° Abnormal update ° Time stamp ° NIA ° Instrument Cluster
ECM SPN 411, Engine Exhaust Gas Recirculation Differential Pressure -MID 128 PID 411
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI O Data valid but abovenormal operationalrange -Most severelevel
Exhaust GasRecirculation(EGR) differentialpressure sensoroutput reading toohigh. (abnormalvalue)
° MIL illuminated° Engine derate
° Faulty harness°
Faulty harness connector° Faulty sensor° EGR leakage° Clogged EGR cooler
FMI 1 Data valid but belownormal operationalrange -Most severelevel
Exhaust GasRecirculation(EGR) differentialpressure sensoroutput reading toolow. (abnormalvalue)
° MIL illuminated ° Faulty harness° Faulty harness connector° Faulty sensor° Clogged venturi
FMI 2 Data erratic,intermittent orincorrect
Only used tocontrol EGR valve.
° N/A ° N/A
FMI 3Voltage abovenormal orshorted tohigh source
Short to battery inmetering line
Open in theground circuit
° MIL illuminated° Engine derate
° Faulty EGR differential pressuresensor connector
° Faulty EGR differential pressuresensor harness
° Faulty EGR differential pressuresensor
Engine Control Module (ECM) Diagnostic TroubleGmup 28 co d es (o re s )
FMI 5 Current belownormal or opencircuit
Open in the 5 voltsupply line
Short to ground inmetering line
Open in themetering line
° MIL illuminated° Engine derate
Faulty EGR differential pressuresensor connector
Faulty EGR differential pressuresensor hamess
Faulty EGR differential pressuresensor
FMI 7 Mechanical systemnot responding orout of adjustment
EGR differentialpressure sensoris read either tohigh or too low.
(Abnormal value).
’ MIL illuminated° Engine derate
Faulty EGR differential pressuresensor connector
Faulty EGR differential pressuresensor hamess
Faulty EGR differential pressuresensorEGR valve
EGR valve leak
Clogged venturi
ECM SPN 412, Engine Exhaust Gas RecirculationPID 412
Temperature - MID 128
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:Possible Cause:
FMI 0 Data valid but abovenon'nal operationalrange -Most severelevel
Engine ExhaustGas RecirculationTemperature isabove range
°Engine derate ° Extreme driving conditions
EGR cooler failure
FMI 2 Data erratic,intemiittent orincorrect
EGR temperatesignal, believedto be not valid(plausibility fault)
° MIL illuminated°
Engine derate
Faulty sensor
FMI 4Voltage belownormal, or shortedto low source
Short to groundon the meteringside of the EGRSensor circuit
° MIL illuminated° Engine power
will be derated
according to theerror torque map
Faulty EGR Temperature Sensorconnector
Faulty EGR Temperature Sensorharness
Faulty EGR Temperature Sensor
FMI 5 Current belownormal or opencircuit
Short to batteryin the meteringside of the EGRSensor circuit
Open in themetering side ofthe EGR Sensorcircuit
Open circuit inthe ground line ofthe EGR Sensorcircuit
° MIL illuminated° Engine derate
Faulty EGR Temperature Sensorconnector
Faulty EGR Temperature Sensorhamess
Faulty EGR Temperature Sensor
46
Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCs)
FMI13 Out of calibration Engine ExhaustGas RecirculationTemperaturesensor is out ofrange (low)
Sensor indicatesa invalid value
° MIL illuminated Faulty EGR Temperature Sensorconnector
Faulty EGR Temperature Sensorharness
Faulty EGR Temperature Sensor
FM|13 Out of calibration Engine ExhaustGas RecirculationTemperaturesensor is aboverange
° Engine derate Extreme driving conditions
EGR cooler failure
FMI15 Data valid but abovenormal operatingrange -Least severelevel
Engine ExhaustGas RecirculationTemperaturesensor is out ofrange (high)
Sensor indicatesa invalid value
° MIL illuminated Faulty EGR Temperature Sensorconnector
Faulty EGR Temperature Sensorharness
Faulty EGR Temperature Sensor
FMl16 Data valid but abovenormal operatingrange -Moderatelysevere level
Engine ExhaustGas RecirculationTemperature isabove range
’ Engine derate Extreme driving conditions
EGR cooler failure
FMI17 Data valid but belownormal operatingrange -Least severelevel
Engine ExhaustGas RecirculationTemperature isout of range (low)
Sensor indicatesa invalid value
° MIL illuminated Faulty EGR Temperature Sensorconnector
Faulty EGR Temperature Sensorharness
Faulty EGR Temperature Sensor
ECM SPN 558, Accelerator Pedal 1 dle Validation Switch -MID 128 SID 230
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 3Voltage abovenormal, or shortedto high source
Idle ValidationSwitch (IVS)signal shortedto voltage
° Yellow Checklamp illuminated
°Faulty hamess or connector
FMI 5 ° Current belownormal or opencircuit
ldle ValidationSwitch (IVS)signal shortedto ground oropen
° Yellow Checklamp illuminated
° Faulty hamess or connector
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
ECM SPN 626, Intake Air Heater (IAH) Relay - M D 128 PID 45
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3Voltage abovenormal, or shortedto high source
° Short Circuit +,Measuring line
’ Preheat relay not ‘activated
° White smoke forcold start
’ Start problems incold climate
FMI 4Voltage belownormal, or shortedto low source
Short Circuit -,Measuring line
° Yellow Checklamp illuminated
° Induction air is hot° Preheat relay is
impossible to tumoff
° Faulty hamess
FMI 5 Current belownormal or opencircuit
Open Circuit ° Preheat relay notactivated
° White smoke forcold start
° Start problems incold climate
° Faulty Preheat relay° Faulty hamess
ECM SPN 628, Program Memory - MID 128 SID 240
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 2 ° Data erratic,intemiittent orincorrect
° Check sum error ° Red Stop lampilluminated
°Engine will notstart
° Engine Control Module (ECM)software
FMI11 Root cause notknown
Bad softwareconfiguration
° MIL illuminated° Engine will not
Start
° Engine Control Module (ECM)software
FMl12 Bad intelligentdevice orcomponent
Error on code-partof flash RAM orerased vendorarea
° Red Stop lampilluminated
° Nothing functions
° Engine Control Module (ECM)software
°Engine Control Module (ECM)
FMI14Special instructions VIN not loaded yet ° Flashing MIL
° Engine will notSlarl
° VIN missing
48
Preheat relay solenoid shorted
Engine Control Module (ECM) Diagnostic TroubleG' ° ”p 28 codes ( mos )
ECM SPN 629, Electronic Control Unit (ECU) 1 - MID 128 SID 254
Type of FMI Description: Fault Condition: Possible Possible Caus e:
fault: Symptoms:
FMI 8 ° Abnormal frequency ° Self test failureor pulse width orpenod
° Red Stop lampilluminated
° Not possible toprogram EngineControl Module(ECM)
° Engine Control Module (ECM)
device orcomponent
FMI 12 ° Bad intelligent° Self test failure ° Red Stop lamp
illuminated° Engine will not
start
° Engine Control Module (ECM)
ECM SPN 630, Calibration Memory - MID 128 SID 253
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 2 ° Data erratic,intennittent orincorrect
° Check sum error ° Red Stop lampilluminated
° Engine will notstart
° Engine Control Module (ECM)software
FMI12 ° Bad intelligentdevice orcomponent
° Check sum error ° Red Stop lampilluminated
° Engine will notstart
° Engine Control Module (ECM)
FMI14 ° Special instructions ° VIN not loaded yet ° Flashing MIL ° Engine Control Module (ECM)° Loss of log data s°nwa'e
and some userconfigurable data
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
ECM SPN 631, Calibration Module - MID 128 PSID 77/PSID 124
Type of FMI Description: Fault Condition: Possible Possible Cause:fault: Symptoms:
FMI 3
to high source
° Voltage above ° Check sum error ° Engine will not ° Software errornormal, or shorted - start
FMI 8
penod
° Abnormal frequency ° Reset of ECM °Engine will not ° Software error
or pulse width or does not work start
ECM SPN 633, Engine Fuel Actuator 1 Control Command - MID 128 SID 18
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FM' 3 ° Voltage abovenormal, or shortedto high source
‘ Circuit shorted + ° Yellow Checklamp illuminated
° Valve constantlyshut
° Faulty solenoid° Faulty hamess° Faulty ECM driver
FM' 4 ° Voltage belownormal, or shortedto low source
‘ Circuit shorted- ’ Yellow Checklamp illuminated
° High fuelconsumption dueto fuel leakage
° Faulty solenoid°
Faulty hamess° Faulty ECM driver
FM' 5 ° Current belownormal or opencircuit
° Open circuit ’ Yellow Checklamp illuminated
° Valve constantlyshut
° Faulty solenoid° Faulty harness
ECM SPN 636, Camshaft Position Sensor (CMP) - MID 128 SID 21
Type of FMI Description:fault:
Fault Condition: Possible Possible Cause:Symptoms:
FM' 2 ° Data erratic,intermittent orincon'ect
° Phase Error ° MIL illuminated ° Engine timing' ' "°°"e°t ° Increase in fuelconelationbetween CMPand crankshaftposition (CKP)sensor
consumption
50
Engine Control Module (ECM) Diagnostic TroubleG'°"P 28 codes (o re s )
FM' 3 ° Voltage abovenormal, or shortedto high source
Missing Signalfrom CMP sensor
Open in the CMPsensor circuit
Short to battery inthe CMP sensorcircuit
Short to ground inthe CMP sensorcircuit
MIL illuminated
Possible loss ofengine powerIncreased enginestart time
°Faulty harness
FMI 8 Abnormal frequencyor pulse width orpenod
Noisy Signal fromCMP sensor
Open in the CMPsensor circuit
MIL illuminated
Possible loss ofengine powerIncreased enginestart time
° Faulty CMP sensor° Faulty hamess
Engine Control Module (ECM) Diagnostic TroubleG'°”p 28 co d es ( or es)
ECM SPN 637, Crankshaft Position Sensor (CKP)- MID 128 SID 22
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause
FMI 2 ° Data erratic,intermittent orincorrect
° Intermittent orweak signal
° MIL illuminated° Yellow Check
lamp illuminated’ Increased fuel
consumption° imprecise engine
timing° Increased fuel
consumption° Uneven cylinder
balancing° Power loss° Smoke
° Faulty CKP sensor hamess° Faulty CKP sensor
FMI 3 ° Voltage abovenormal, or shortedto high source
Missing SignalCKP sensor
Open in the CKPsensor circuit
Short to battery inthe CKP sensorcircuit
Short to ground inthe CKP sensorcircuit
° MIL illuminated° Yellow Check
lamp illuminated° Possible loss of
engine power° Increased fuel
consumption
° Faulty CKP sensor hamess°
Faulty CKP sensor
FMI 8 ° Abnormal frequencyor pulse width orpenod
Erratic orintermittent signalfrom CKP sensor
Open in the CKPsensor
° MIL illuminated° Yellow Check
lamp illuminated° Possible loss of
engine power° Increased engine
start time° Increased fuel
consumption° Uneven cylinder
balancing° Power loss° Smoke
°Faulty CKP sensor hamess
° Faulty CKP sensor mounting
52
Group 28 Engine Control Module (ECM) Diagnostic TroubleCodes (DTCs)
ECM SPN 639, SAE .1939 Data Link 1 - MID 128 SID 231
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 2 ° Data erratic,intermittent orincorrect
SAE J1939 high orlow circuit shorted+
SAE J1939 high orlow circuit shorted
SAE J1939 highor low circuit open
° MIL illuminated ° Faulty hamess or connector
ECM SPN 641, Engine Variable Geometry Turbocharger (\/GT) Actuator1- MID 128 SID 27
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
Engine VariableGeometryTurbocharger(\/GT) actuatortemperature out ofrange
° Possible Red Stop ° N/A
lamp illuminated(dependant onseverity)
° Yellow Checklamp illuminated
° Possible enginederate
FMI 2 Data erratic,intermittent orincorrect
Engine VariableGeometryTurbocharger(\/GT) actuatorhas not seen avalid command onCAN2 data link
Incorrect data
° MIL illuminated ° Disturbance on CAN2 data link° Yellow Check
lamp illuminated° Low boost° Low power° Nozzle opens° Smoke from
engine
FMI 4 ° Voltage belownormal, or shortedto low source
Short to ground ° MIL illuminated ° Faulty VGT actuator connector° Yellow Check ° Faulty VGT actuator harness
lamp illuminated ¢ Low bauew Vonage° Nozzle will openresulting in lowpower and lowboost
° VGT actuatorwill continueto attempt andmaintain targetnozzle position
53
Engine Control Module (ECM) Diagnostic TroubleG'°“'° 28 codes (orc s )
FMI 7 .Mechanical systemnot responding orout of adjustment
Mechanicalproblem withthe EngineVariable GeometryTurbocharger(\/GT) actuator
MIL illuminated
Yellow Checklamp illuminated
Low boost andsmoke
Possible enginederate
Power loss insome cases whenactuator motorhas been disabled
° VGT actuator motor effort istemporarily limited to preventoverheating
° Restrictions detected when runningleam sequence
° VGT actuator is slow to followcommands
° VGT actuator position is not trackingcommand
FMI 9 ¢ Abnormal updaterate
Data from theEngine VariableGeometryTurbocharger(\/GT) actuatorhas been missingfor 2-seconds
MIL illuminated
Yellow Checklamp illuminated
Engine derated(major)
EGR valve closed
° Data link hamess° No supply to VGT actuator° VGT actuator° VGT actuator connector
FMl13 o Out of calibration Failed self-calibration
Yellow Checklamp illuminated
° VGT actuator
ECM SPN 642, Engine Variable Geometry Turbocharger (VGT) Actuator 2- MID 128 PPID 89
faultType of FMI Description: Fault Condition: Possible
Symptoms:Possible Cause
FMI 0 o Data valid but abovenormal operationalrange -Most severelevel
VGT SRAtemperature iscritically high
Red Stop lampilluminated
Engine derate
° Coolant system malfunction° Extreme driving conditions° Overheated VGT actuator
FMI16 . Data valid but abovenormal operatingrange -Moderatelysevere level
VGT SRAtemperature ismoderately toohigh
Yellow Check lampilluminated
Engine derate
° Coolant system malfunction° Extreme driving conditions° Overheated VGT actuator
ECM SPN 647, Engine Fan Clutch Output Device Driver- MID 128 SID 33
Type of FMI Description: Fault Condition: Possible Possible Cause:fault: Symptoms:
FMI 3 ‘ Voltage above ° Short to positive ° Yellow Check ° Faulty cooling fan actuatornormal, or shorted in the cooling fan lamp illuminated ¢ Fauny coming fan actuator hamess orto high source control circuit » mcreased fue| connector
consumptionFan mns at fullspeed
54
Group 28 Engine Control Module ECM Diagnostic Trouble( )Codes (DTCs)
FMI 4Voltage belownormal, or shortedto low source
Short to groundin the cooling fancontrol circuit
Output voltageis 1/3 the supplyvonage
Yellow Checklamp illuminated
Fan alwaysdeactivated oralways activated iffault is intermittent
° Faulty cooling fan actuator° Faulty cooling fan actuator hamess or
connector
FMI 5 Current belownormal or opencircuit
Open in thecooling fan controlcircuit
Increased fuelconsumptionFan runs at fullspeed
° Faulty cooling fan actuator° Faulty cooling fan actuator harness or
connector
ECM SPN 651, Engine Injector Cylinder 1- MID 128 SID 1
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3Voltage abovenormal, or shortedto high source
Hamess shorted +
low side circuitMIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (mistire)
° Faulty harness
FMI 5 Current belownormal oropencircuit
Harness shorted+,-oropen highside circuit
Harness shorted -low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (misfire)
° Faulty hamess° Faulty engine fuel injector
FMI 7 Mechanical systemnot respondingproperly
Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing°
Faulty engine fuel injector° Low cylinder compression° Damaged or flywheel
FMI 8 Abnormal frequency,pulse width, orpenod
Misfire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
FMI13 Out of calibration Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing° Faulty engine fuel injector° Low cylinder compression° Damaged or flywheel
FMI 31 Condition exists Misfire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
55
Engine Control Module (ECM) Diagnostic TroubleG'°“" 28 codes (bros)
ECM SPN 652, Engine Injector Cylinder 2 - MID 128 SID 2
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FM' 3 ° Voltage abovenormal, or shortedto high source
° Hamess shorted +
low side circuitMIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (mistire)
’ Faulty harness
FMI 5 ° Current belownormal oropencircuit
° Harness shorted+,-oropen highside circuit
° Harness shorted -low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (misire)
° Faulty harness° Faulty engine fuel injector
FMI 7 ° Mechanical systemnot respondingproperly
° Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing° Faulty engine fuel injector° Low cylinder c ompr e ssion° Damaged orflywheel
FMI 8 o
pulse width, orpenod
Abnormalfrequency,° Mislire detected MIL illuminated
Rough engine idle
° Faulty engine fuel iniector (possiblyclogged)
FM' 13 ° Out of calibration °Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing’ Faulty engine fuel iniector° Low cylinder c ompr e ssion° Damaged or flywheel
FM' 31 ° Condition exists ° Misfire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
ECM SPN 653, Engine Injector Cylinder 3 - MID 128 SID 3
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
FMI 3
to high source
° Voltage above ° Harness shorted +
normal, or shorted low side circuitMIL illuminated
Yellow Check
lamp illuminated
Engine power loss
Engine runninguneven (mistire)
° Faulty harness
56
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Group 28Engine Control Module (ECM) Diagnostic Trouble
CCodes (DT S)
FMI 5 Current belownormal or opencircuit
Hamess shorted+,- or open highside circuit
Harness shorted-low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (misfire)
° Faulty harness° Faulty engine fuel injector
FMI 7 Mechanical systemnot respondingproperly
Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing‘ Faulty engine fuel injector° Low cylinder compression° Damaged or tlywheel
FMI 8 Abnormal frequency,pulse width, orpenod
Mistire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
FM|13 Out of calibration Cylinder balancingdata above limit
MIL illuminated ’ PTO engaged without ECM knowing° Faulty engine fuel injector° Low cylinder compression° Damaged or flywheel
FMI 31 ° Condition exists Mistire detected MIL illuminated
Rough engine idle
° aulty engine el injector (possiblyF fu
clogged)
ECM SPN 654, Engine Injector Cylinder 4 - MID 128 SID 4
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 Voltage abovenormal, or shortedto high source
Harness shorted +low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (mistire)
° Faulty harness
FMI 5 Current belownormal or opencircuit
Harness shorted+,- oropen highside circuit
Harness shorted -low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (mistire)
’ Faulty harness° Faulty engine fuel injector
FMI 7 Mechanical systemnot respondingproperly
Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing°
Faulty engine fuel injector° Low cylinder compression° Damaged or flywheel
FMI 8 Abnormal frequency,pulse width, orpenod
Misire detected MIL illuminated
Rough engine idle
' Faulty engine fuel injector (possiblyclogged)
57
Engine Control Module (ECM) Diagnostic Trouble
G'°“|° 28 codes (pros )
FM' 13 ° outofcalibration ° cyiinderbalancing° M||_i||uminated
data above limit
° PTO engaged without ECM knowing° Faulty engine fuel injector° Low cylinder compression° Damaged orflywheel
FMI31 ° Condition exists ° Misire detected ° MIL illuminated ° Faulty engine fuel injector (possibly° Rough engine idle °I°99edI
ECM SPN 655, Engine Injector Cylinder 5 - MID 128 SID 5
fault:Type of FMI Description: Fault Condition: Possible Possible Caus e:
Symptoms:
FMI 3Voltage abovenormal, or shortedto high source
° Harness shorted +
low side circuit
° MIL illuminated° Yellow Check
lamp illuminated
° Faulty harness
° Engine power loss°
Engine runninguneven (misfire)
FMI 5 Current belownomwal or opencircuit
° Harness shorted+,-oropen highside circuit
° Harness shorted-low side circuit
’ MIL illuminated° Yellow Check
lamp illuminated
°Faulty harness
° Faulty engine fuel injector
° Engine power loss° Engine running
uneven (misfire)
FMI 7 Mechanical systemnot respondingproperly
° Cylinder balancingdata above limit
° MIL illuminated ° PTO engaged without ECM knowing° Faulty engine fuel injector' Low cylinder compression° Damaged orflywheel
FMI 8 Abnormal frequency,pulse width, orpenod
° Mistire detected ° MIL illuminated ° Faulty engine fuel injector (possibly° Rough engine idle dogged)
FMI13 Out of calibration ° Cylinder balancingdata above limit
° MIL illuminated ° PTO engaged without ECM knowing° Faulty engine fuel injector° Low cylinder compression° Damaged or flywheel
FMI 31 ° Condition exists ° Misfire detected ° MIL illuminated ° Faulty engine fuel injector (possiblyclogged)° Rough engine idle
58
Engine Control Module (ECM) Diagnostic Trouble
G'°“'° 28 codes (orcs)
ECM SPN 656, Engine Injector Cylinder 6 - MID 128 SID 6
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Caus e:
FMI 3 Voltage abovenormal, or shortedto high source
Harness shorted +
low side circuitMIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (misfire)
° Faulty harness
FMI 5 Current belownormal or opencircuit
Hamess shorted+,-oropen highside circuit
Harness shorted-low side circuit
MIL illuminated
Yellow Checklamp illuminated
Engine power loss
Engine runninguneven (misfire)
° Faulty harness° Faulty engine fuel injector
FMI 7 Mechanical systemnot respondingproperly
Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing°
Faulty engine fuel injector° Low cylinder c om pre s s i on
° Damaged or flywheel
FMI 8 Abnormal frequency,pulse width, orpenod
Misire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
FMI13 Out of calibration Cylinder balancingdata above limit
MIL illuminated ° PTO engaged without ECM knowing° Faulty engine fuel iniector° Low cylinder c ompr e ss ion° Damaged or flywheel
FMI 31 Condition exists Misfire detected MIL illuminated
Rough engine idle
° Faulty engine fuel injector (possiblyclogged)
ECM SPN 677, Engine Starter Motor Relay - MID 128 SID 39
Type of FMI Description: Fault Condition: Possible
fault: Symptoms:
Possible Cause:
FMI 3 Q ¢
normal, or shortedto high source
Voltage above Circuit shorted + Yellow Checklamp illuminated
Engine will notstart
° Faulty starter relay° Fault harness
FMI 5 ° Current below ’ Open circuitnormal or opencircuit
Yellow Checklamp illuminated
Engine will notStart
° Faulty starter relay° Fault harness
Engine Control Module (ECM) Diagnostic Trouble
G'°”'° 28 codes (ores)
ECM SPN 729, Intake Air Heater (IAH) 1 - MID 128 SID 70
Type offault:
FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted +,measuring line
° Yellow Checklamp illuminated
Faulty preheat relay
Faulty intake air heater (IAH) 1
FMI 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted -,measuring line
’ Yellow Check
lamp illuminatedFaulty preheat relay
Faulty intake air heater (IAH) 1
|=rv||'5 ° Current belownormal or opencircuit
‘ Open circuit ° Yellow Checklamp illuminated
‘ Faulty intake air heater (IAH) 1
ECM SPN 730, Intake Air Heater (lAH) 2 -MID 128SID 71
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted +,measuring line
° Yellow Checklamp illuminated
Faulty preheat relay
Fautly intake air heater (IAH) 2
FMI 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted -,measuring line
° Yellow Check
lamp illuminatedFaulty preheat relay
Fautly intake air heater (IAH) 2
FMI 5 ° Current belownormal or opencircuit
° Open circuit ° Yellow Checklamp illuminated
° Fautly intake air heater (IAH) 2
60
Engine Control Module (ECM) Diagnostic Trouble
G'°“'° 28 codes (orcs)
ECM SPN 975, Estimated Percent Fan Speed - (MID 128 PID 26)
Type of FMI Description:fault:
Fault Condition:Symptoms:Possible Possible Cause:
FM' 3 ° Voltage abovenormal, or shortedto high source
° Missing signalfrom Fan SpeedSensor
’ Short Circuit +,Measuring line
° Short Circuit -,Measuring line
' Open Circuit,Measuring line
° Open Circuit,Ground line
° Higher fuelconsumption
fan, 100%fan
speed ifcoolinneeded
° Vlhll work as on/off
g i s
°c
° | =
failure
sensor harness
ooling Fan Speed (CFS) sensor
aulty Cooling Fan Speed (CFS)
Engine Control Module (ECM) Diagnostic TroubleG'°“'° 28 codes (p ro s )
ECM SPN 1072, Engine Compression Brake Output #1 - MID 128 PPID 122
Type offault
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause
FMI 1 Data valid but belownormal operationalrange -Most severelevel
’ Below range Info lampilluminated
No EngineCompressionBrake
° Low engine oil temperature
FMI 3Voltage abovenormal, or shortedto high source
° Short Circuit + YellowCheck lampilluminated
EngineCompressionBrake can notbe tumed on
Engine brakefunction derated
Gear shiftperformancederated forsome automatictransmissions
° Faulty Engine Compression Brakeactuator
° Faulty harness
FMI 4 ° Voltage belownormal, or shortedto low source
’ Short Circuit- YellowCheck lampilluminated
Compressionbrake can notbe tumed off
Engine stopsrunning
Engine impossibleto restart
° Faulty Engine Compression Brakeactuator
° Faulty harness
FMI 5 ° Current belownormal or opencircuit
° Open Circuit Yellow Check lampilluminated
Compression rakecan not be tumedon
Engine brakefunction derated
Gear shiftperformancederated forsome automatictransmissionboxes
’ Faulty Engine Compression Brakeactuator
° Faulty hamess
62
Engine Control Module (ECM) Diagnostic Trouble
G'°“P 28 codes ( br os)
ECM SPN 1127, Engine Turbocharger Intake Manifold Pressure (IMP)-MID 128 PSID 98
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI O Data valid but abovenormal operationalrange
EngineTurbochargerboost pressureis too high
° MIL illuminated° Turbocharger
surge
EGR system failure
Faulty Turbocharger oulet pressuresensor
FMI 1 Data valid but belownormal operationalrange
EngineTurbochargerboost pressureis too low
° MIL illuminated’ Engine derate° Engine slow to
respond
Air leak in turbocharger hose s, pipes,brackets, cooler or componentsEGR system fault
FM|10 Abnormal rate of
change
Poor EngineTurbochargerboost pressureresponse
° MIL illuminated’ Engine power
Iosslre-sponse/drivability
Turbocharger inlet air system leak
Faulty Turbocharger
FMI11 Root cause notknown
Variable GeometryTurbochargercontrol mode fault
° MIL illuminated Variable Geometry Turbocharger fault
FMI13 Out of calibration Variable GeometryTurbochargercontrol modeadjustmentexceeded
° Engine powerIosslre-sponse/drivability
Air leak inturbocharger hoses, pipes,brackets, cooler orcomponentsEGR system fault
Faulty Turbocharger oulet pressuresensorExhaust back pressure too high
FMI14Special instructions Poor Engine
Turbochargerboost pressureresponse
° MIL illuminated Air leak in turbocharger hoses, pipes,brackets, cooler orcomponentsVariable Geometry Turbocharger fault
Oil pressure fault
FM|16 Data valid but abovenormal operatingrange -Moderatelysevere level
EngineTurbochargerboost pressureis too high
° MIL illuminated° Turbocharger
surge
EGR system failure
Faulty sensor
FMI18 Data valid but belownormal operatingrange -Moderatelysevere level
EngineTurbochargerboost pressureis too low
° MIL illuminated°
Engine derate
° Engine slow torespond
Air leak in turbocharger hoses, pipes,brackets, cooler or components
EGR system failure
63
Engine Control Module (ECM) Diagnostic Trouble
G"°“'° 28 codes ( m os)
ECM SPN 1136, Engine Control Module (ECM) Temperature - MID 128
PPID 55
faultType of FMI Description: Fault Condition: Possible Possible Cause
Symptoms:
FM' 4 ° Voltage belownormal, or shortedto low source
° Short to groundonthe meteringcircuit
° N/A ° Engine Control Module (ECM)
FM' 5 ° Current belownormal or opencircuit
° Short to batteryin the meteringcircuit
° Open in themetering circuit
° Open circuit in theground circuit
° N/A ° Engine Control Module (ECM)
ECM SPN 1198, Anti-theft Random Number- MID 128 PID 224
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 2 ° Data erratic,intermittent orincorrect
° Engine ControlModule andInstrument ControlModule securitycodes do notmatch
Yellow Checklamp illuminated
Can stanengine
° Security system failure
FMl12 ’ Bad intelligentdevice orcomponent
° Security systemnot installed
Yellow Checklamp illuminated
Can stan engine
° Security system failure
64
Engine Control Module (ECM) Diagnostic Trouble
Group 28 Codes (DTCs)
ECM SPN 1231, SAE J1939 Data Link 2 - MID 128 PSID 229
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 2 ° Data erratic,intermittent orincorrect
° Circuit shorted +
° Circuit shorted-’ Open circuit
MIL illuminated
Engine power loss
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
No variable
geometry engineturbochargercontrol
° Faulty harness
FMI 9 ° Abnomal updaterate
° Missing signalfrom TransmissionControl Module
(TCM)
MIL illuminated
Yellow Checklamp illuminated
NoAflertreatmentDiesel ExhaustFluid (DEF)dosing
° SAE J1939 data link° Faulty hamess or connectors° DEF pump° Aftertreatment Diesel Exhaust Fluid
(DEF) control module
ECM SPN 1265, Engine Piston CooSID 85
ing Oil Pressure Actuator -MID 128
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted + Yellow Checklamp illuminated
Possible smokeduring start up
° Faulty harness° Faulty actuator
FMI 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted - Red Stop lampilluminated
Engine damagecan occur without
piston cooling
° Faulty harness° Faulty actuator
FMI 5 ° Current belownormal or opencircuit
° Open circuit Yellow Checklamp illuminated
Possible smokeduring start up
° Faulty harness° Faulty actuator
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCS)
ECM SPN 1322, Engine Misfire for Multiple Cylinders- MID 128 PSID 27
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 8
or pulse width orpenod
° Abnormal frequency°
Cylinder mistiresdetected inmultiple cylinders
° MIL illuminated ° Engine fuel injectors° Rough idle
FMI 31 ° Condition exists ° Cylinder mistiresdetected inmultiple cylinders
° Rough idle ° Engine fuel injectors° MIL illuminated
ECM SPN 1659, Engine Coolant System Thermostat - MID 128 PSID 109
Type of FMI Description: Fault Condition: Possible Possible Caus e:
fault: Symptoms:
not responding or closed drivabilityout of adjustment
FMI? ° Mechanical system° Thermostat stuck ° Possible poor
° Coolant thermostat
device or leaking or stuck o Longer enginecomponent open warm up time
° Poor heat in cab
FMI12 ° Bad intelligent° Thermostat is ° MIL illuminated ° Coolant thermostat
ECM SPN 1675, Engine Starter Mode - MID 128 SID 39
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI O Data valid but abovenormal operationalrange -Most severelevel
° Starteroverheating
° Engine will notstart
Starter is deactivated due tooverheating
FMI 7 Mechanical systemnot responding orout of adjustment
° Transmission notin neutral
° Engine will notstart
Starter is deactivated due tooverheating
FMI10 Abnormal rate ofchange
° Starter gear isstuck, engagedwith engine
° Engine will notstart
Starter is deactivated due tooverheating
FMI14 Special instructions ° PTO is engagedor switch on
’ Engine will notstart
Starter is deactivated due tooverheating
66
Engine Control Module (ECM) Diagnostic TroubleG'°“P 28 codes ( m os)
ECM SPN 1677, Aftertreatment DPF Auxiliary Heater Mode - MID 128PSID 25
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 0 ‘ Data valid but above °normal operationalrange - mostsevere level
Truck has idledtoo long withoutcompleting aperiodic heatmode
Red Stop lampilluminated
Engine derate
High temperaturespikes in DPFwhen drivingis resumed orduring stationaryregeneration
Extremely cold ambient temperatures
PTO operated with limited exhausttemperatures
Engine turbocharger
Engine turbocharger compressorbypass valve
FMI 7 ° Mechanical system °not responding orout of adjustment
Truck has idledtoo long withoutcompleting aperiodic heatmode
Yellow Checklamp illuminated
White exhaustsmoke
High temperaturespikes in DPFwhen dn vingis resumed orduring stationaryregeneration
Extremely cold ambient temperaturesPTO operated with limited exhausttemperatures
Engine turbocharger
Engine turbocharger compressorbypass valve
FM|16 ° Data valid but above °normal operatingrange -Moderatelysevere level
Truck has idledtoo long withoutcompleting aperiodic heatmode
Yellow Checklamp illuminated
White exhaustsmoke
High temperaturespikes in DPFwhen drivingis resumed orduring stationaryregeneration
Extremely cold ambient temperaturesPTO operated with limited exhausttemperatures
Engine turbocharger
Engine turbocharger compressorbypass valve
ECM SPN 1761, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Level-PPID 278
fault:Type of FMI De sc r iption: Fault Condition: Possible Possible Cau s e:
Symptoms:
FMI 3 ° Voltage above °normal, or shortedto high source
Short circuit highside
° NIA DEF tank pickup assembly/sensorfailure
FMI 5 ° Current below °normal oropen ocircuit
Short circuit +
Open circuit
Yellow Checklamp illuminated
DEF tank pickup assembly/sensorfailure
FMI11 ° Root cause not °known
DEF tank level low °(driver waming)
Low DEF fluidlamp illuminated
N/A
67
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FMI 14 ° Special Instructions ° DEF tank almost
empty (driverwarning)
° Low DEF fluidlamp illuminated
° No AftertreatmentDiesel ExhaustFluid (DEF)dosing
° N/A
FM' 18 ° Data valid but belownormal operatingrange -Moderatelysevere level
° DEF tank almostempty (driverwarning)
° Low DEF fluidlamp illuminated
° NoAttertreatmentDiesel ExhaustFluid (DEF)dosing
° N/A
ECM SPN 2003, Transmission Control Module (TCM) Status - MID 128PSID 205
Type of FMI Description:fault:
Fault Condition: Possible IPossible Cause:
Symptoms:
FM' 9 ° Abnormal updaterate
° Missing signal° N/A ° Datalink error
from TransmissionControl Module(TCM)
ECM SPN 2017, Cruise Control Status -MID 128 PID 85
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 9 ° Abnormal updaterate
° Missing (CruiseControl) signalfrom VECU
° Cruise Controldoes not work
‘ Noclutch information to Engine ControlModule (ECM) from SAE J1939 datalink
ECM SPN 2029, Invalid or Missing Data from Vehicle ECU - MID 128 PSID201
Type of FMI Description: Fault Condition: Possible
fault: Symptoms:
Possible Cause:
FM' 8 ° Abnormal frequencyor pulse width orpenod
° No contact withVECU
° Yellow Check
lamp illuminated° PTO, engine
compressionbrake and cruisecontrol do notwork
° Faulty harness
FM' 9 ° Abnormal updaterate
° Missing signal ’from cluster
MIL illuminated ° Faulty harness
68
Engine Control Module (ECM) Diagnostic TroubleG' °“p 28 codes ( or cs)
ECM SPN 2629, Engine Turbocharger Compressor Outlet Temperature -MID 128 PID 404
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Estimated engineturbochargerdischargetemperature error.
° Engine derate ° High ambient temperature° Low barometric pressure° Leak inengine turbocharger inlet tube
FMI 2 Data erratic,intermittent orincorrect
' Engineturbochargeroutlet temperaturesignal believed tobe not valid (high)(plausibility fault)
° Engine derate° MlLilIuminated
° Engine turbocharger outlet temperaturesensor
FMI 4Voltage belownormal, or shortedto low source
° Short circuit -,measuring line
° MIL illuminated° Yellow Check
lamp illuminated
° Faulty sensor° Faulty harness
FMI 5 Current belownormal or opencircuit
° Short circuit +,measuring line
° Open circuit
° MIL illuminated° Yellow Check
lamp illuminated
° Faulty sensor° Faulty harness
FM|13 Out of calibration ° Sensor out ofrange
° MIL illuminated ° Faulty sensor
FMI15 Data valid but abovenormal operatingrange -Least severelevel
° Sensor out of
range
° MIL illuminated ° Faulty sensor
FM|17 Data valid but belownormal operatingrange-Least severelevel
° Sensor out ofrange
° MIL illuminated ° Faulty sensor
ECM SPN 2659, Eng- MID 128 PPID 35ine Exhaust Gas Recirculation (EGR) Mass Flow Rate
Type offault:
FMI Description: Fault Condition: PossibleSy mp t o ms:
Possible Cause:
FMI 0(J1587only)
Data valid but above ° EGR flow is too ° MIL illuminated
normal operational high » Exhaust Smokerange
‘ Faulty EGR system
FMI 1 Data valid but below ° EGR flow is too ° MIL illuminatednormal operationalrange
low
° Faulty EGR system° Clogged EGR cooler
69
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
range -Moderatelysevere level
FN"16 ° Datavarid butabove ° EGR nowisroo ° Mrurruminatednonnal operating high » Exhaust Smoke
°Faulty EGR system
° Faulty harness or connector
range -Moderatelysevere level
F"’"18 ° Dara valid butberow ° EGR fiowistoo ° M||_irruminatednormal operating low
° Faulty EGR system° Clogged EGR cooler° Faulty hamess or connector
ECM SPN 2791, Engine Exhaust Gas Recirculation (EGR) Valve Control-MID 128 SID 146
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Stuck EGR valve° EGR valve circuit
shorted +
° EGR valve circuitshorted to -
° MIL illuminated° Engine derate
° Faulty harness or connector° Faulty EGR valve
FMI 5 ° Current belownormal or opencircuit
‘ Open EGR valvecircuit
° MIL illuminated°
Engine derate
’ Faulty hamess orconnector° Faulty EGR valve
ECM SPN 2836, Battery Potential/Switched Voltage - MID 128 PSID 49
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 ° Voltage abovenomwal, or shortedto high source
° Battery voltagetoo high
° N/A ° Faulty cab or chassis harness’ Charging system fault° External charger
FMI 4 °Voltage belownormal, or shortedto low source
° Battery voltagetoo low
° Starter will notcrank
° Faulty cab or chassis harness° Charging system fault° Battery° Fuse
70
Engine Control Module (ECM) Diagnostic TroubleG'°“"28 I codes (DTCS)
ECM SPN 3031, Aftertreatment Diesel Exhaust F uid (DEF) Tank
Temperature - MID 128 PPID 274
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenon‘nal operationalrange -Most severelevel
AftertreatmentDiesel ExhaustFluid (DEF) tanktemperature toohigh
Date datamessage missingon SAE J1587data link. (Clustererror).
° MIL illuminated° No Aftertreatment
Diesel ExhaustFluid (DEF)dosing
‘ DEF tank pickup assemblylsensorfailure
FMI 4 Voltage belownormal, or shortedto low source
Short Circuit- ° MIL illuminated ° DEF tank pickup assembly/sensorfailure
° DEF tank pickup asssembly/sensorwiring or connectors
FMI 5 Current belownormal or opencircuit
Short Circuit +
Open Circuit
° MIL illuminated ‘ DEF tank pickup assembly/sensorfailure
° DEF tank pickup assembly/sensorwiring orconnectors
FMI 8 Abnormal frequencyorpulse width orpenod
Sensor ripple isnot too high
‘ N / A ' ° DEF tank pickup assembly/sensorfailure
° DEF tank pickup ‘assembly/sensorwiring orconnectors
ECM SPN 3064, Aftertreatment DPF System Monitor - MID 128 PPID 326
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
Moderately highsoot load
° Yellow Checklamp illuminated
° Medium to highengine derate
° Diesel Particulate Filter (DPF) clogged° After Treatment Fuel Injector clogged° Regeneration disabled by driver or
other component
FMI10 Abnormal rate of
change
Soot loading highdue to heavyload or use (noproblem)
° Yellow Checklamp illuminated
° Engine derate
° No error, condition occurs during heavyload or use with high soot loading
FMI11 Root cause notknown
Critically high sootload
° Red Stop lampilluminated
° High enginederate
° Engine derate
° Diesel Particulate Filter (DPF) clogged° Aftertreatment hydrocarbon doser
(injector)° Regeneration disabled by driver or
other component
71
Engine Control Module (ECM) Diagnostic TroubleG' °“p 28 codes ( br os)
ECM SPN 3216, Aftertreatment Intake NOX - MID 128 PPID 348
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Caus e:
FMI 2 ° Data erratic,intermittent orincorrect
° Inlet NOx sensorerror (plausibility)
° MIL illuminated ° Engine out NOx high’ Faulty NOx sensor
FMI 3 ° Voltage above
normal, or shortedto high source
° Short Circuit, NOX
signal
° MIL illuminated ° Faulty wiring between NOx sensor andNOx sensor ECU
° Faulty NOx sensor
FMI 5 ° Current belownormal or opencircuit
° Open Circuit, NOx
signal
° MIL illuminated ° Faulty wiring between NOx sensor andNOx sensor ECU
° Faulty NOx sensor
FMI 9 ° Abnormal updaterate
° Missing signalfrom NOx sensor
° MIL illuminated° Yellow Check
lamp illuminated
° Loss of communication from NOxsensor ECU and Engine ControlModule (ECM)
FMI11 ° Root cause notknown
° NOx sensormeasures nearzero for long timewith high load
° MIL illuminated ° Faulty NOx sensor
FM|12 ° Bad intelligentdevice orcomponent
° NOx-sensor signalcorrupt (incorrectvalue)
° MIL illuminated °Faulty NOx sensor
FM|13 ° Out of calibration ° NOx-sensoractivation(incorrect value)
° MIL illuminated ° Faulty NOx sensor
FMI 14 ° Special instructions ° Missing signalfrom sensor dueto battery voltage
° MIL illuminated ° Voltage to NOx sensor is too high ortoo low
° Faulty hamess to sensor
ECM SPN 3226, Aftertreatment Out et NOx - MID
MID 233 Fault code sent by MID 128 Engine control unit
128 PPID 270/ PSID 90
Type offault
FMI Description: Fault Condition: PossibleS ym ptom s:
Possible Cause
FMI 2 ° Data erratic,intermittent orincorrect
° Inlet NOx sensorerror (plausibility)
° Mismatch betweensensors
° MIL illuminated ° Engine out NOx high -° Faulty NOx sensor° Attertreatment Diesel Exhaust Fluid
(DEF) quality
FMI 3 ° Voltage abovenormal or shortedto high source
’ Short Circuit, NOxsignal
° MIL illuminated ° Faulty wiring between NOx sensor andNOx sensor ECU
° Faulty NOx sensor
FMI 5 ’ Current belownormal or opencircuit
’ Open Circuit, NOxsignal
° MIL illuminated ° Faulty wiring between NOx sensor andNOx sensor ECU
° Faulty NOx sensor
72
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
MID 233 Fault code sent by MID 128 Engine control unit (cont’d.)
FMI 9 Abnormal updaterate
° Missing signalfrom NOx sensor
MIL illuminated° Yellow Check lamp
illuminated
‘ Loss of communication from NOxsensor ECU and Engine Control
Module (ECM)
FMI11 Root cause notknown
° NOx sensormeasures nearzero for long timewith high load
MIL illuminated ° Faulty NOx sensor
FM|12 Bad intelligentdevice orcomponent
° NOx-sensor signalcorrupt (incorrectvalue)
MIL illuminated ’ Faulty NOx sensor
FM|13 Out of calibration ° NOx-sensoractivation(incorrect value)
MIL illuminated ° Faulty NOx sensor
FMI14Special instructions ° Missing signal
from sensor due tobattery voltage
MIL illuminated ° Voltage to NOx sensor is too high or
° Faulty harness to sensortoo low
FMI 31 Condition exists ° Inlet NOx sensorerror
° Mismatch betweensensors
MIL illuminated ' Engine out NOx high° Faulty NOx sensor° Aftertreatment Diesel Exhaust Fluid
(DEF) quality
ECM SPN 3245, Aftertreatment DPF Outlet Temperature - MID 128 PPID436
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Caus e:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Temperaturecritically too high
Low engine power° Restricted Catalyst° Intake air leak° Faulty sensor
FMI 2 Data erratic,intermittent orincorrect
° Sensor isnot rational(plausibility)
MIL illuminated
Regeneration notpossible
° Faulty sensor° Exhaust system leak° Faulty hames s connectors or
connections
FMI 4Voltage belownormal, or shortedto low source
° Short to ground onthe metering sideofthe circuit
MIL illuminated
Regeneration notpossible
° Faulty harness° Faulty sensor° Aftertreatment control module (ACM)
73
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
FMI 5 o Current belownormal or opencircuit
Short to battery onthe metering sideof the circuit
Open in themetering side ofthe circuit
Open in theground side ofthe circuit
° MIL illuminated °Faulty harness
° Faulty sensor° Aftertreatment control module (ACM)
FMI 15 . Data valid but abovenormal operatingrange -Least severelevel
Temperaturesensor is out of
range (high)Sensor indicates ainvalid value
’ MIL illuminated ° Faulty harness° Faulty sensor
ECM SPN 3249, Aftertreatment DPF Intake Temperature -MID 128 PPID387
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 2 o Data erratic,intermittent orincorrect
Sensor isnot rational(plausibility)
° MIL illuminated° Aborted
regeneration
° Faulty harness° Faulty harness connectors or
connections° Exhaust system leak° Faulty sensor
FMI 4 oVoltage belownormal, or shortedto low source
Short to ground onthe metering sideof the circuit
° MIL illuminated° Aborted
regeneration
° Faulty hamess° Faulty sensor° Aftertreatment control module (ACM)
FMI 5 o Current belownormal or opencircuit
Short to battery onthe metering sideof the circuit
Open in themetering side ofthe circuit
Open in theground side ofthe circuit
° MIL illuminated° Regeneration not
possible
° Faulty harness' Faulty sensor° Aftertreatment control module (ACM)
FMI15 ¢ Data valid but abovenormal operatingrange-Least severelevel
Temperaturesensor is out ofrange (high)
Sensor indicates ainvalid value
° MIL illuminated ° Faulty harness° Faulty sensor
74
Engine Control Module (ECM) Diagnostic TroubleG"°“l’ 28 codes ( m os)
ECM SPN 3251, Aftertreatment DPF Differential Pressure - MID 128 PID 81
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange
° Critically highpressure
° Engine derate° Red Stop lamp
illuminated
Aftertreatment diesel particulate filter
(DPF) differential pressure sensorfailure
FMI 2 Data erratic,intem1ittent orincorrect
° Sensor is notrational
’ MIL illuminated Aftertreatment diesel particulate Hlter
(DPF) differential pressure sensorfailure
FMI 3 Voltage abovenormal, or shortedto high source
° Short to battery onthe metering side
° Open in theground line
° MIL illuminated Aftertreatment diesel particulate filter
(DPF) differential pressure sensorfailure
Faulty aftertreatment diesel particulatefilter (DPF) differential pressure sensorconnector
Faulty harness
FMI 5 Current belownormal or opencircuit
’ Open in 5 volt
supply line° Short to ground in
metering line° Open in metering
line
° MIL illuminated Aftertreatment diesel particulate filter
(DPF) differential pressure sensorfailure
Faulty harness
FMl16 Data valid but abovenormal operatingrange -Moderatelysevere level
° Moderately highpressure
° Engine derate Aftertreatment diesel particulate filter
(DPF) differential pressure sensorfailure
ECM SPN 3363,_Afte- MID 128 PSID 75rtreatment Diesel Exhaust Fluid (DEF) Tank Heater
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 2 Data erratic,intermittent orincorrect
° Commandedvalve position isnot plausible
° N/A Faulty hamess orconnectorsAftertreatment DEF tank temperaturesensor
Aftertreatment DEF tank heating valve
FMI 3 Voltage above
normal, or shortedto high source
° Circuit shorted + ° NIA Aftertreatment DEF pump assembly
FMI 4 Voltage belownormal, or shortedto low source
° Circuit shorted -° Open circuit
° N/A Aftertreatment DEF pump assembly
FMI 5 Current belownormal or opencircuit
° Open circuit ° N/A Aftertreatment DEF pump assembly
75
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
ECM SPN 3471, AflePPID 328
rtreatment Fue Pressure Control Actuator - MID 128
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted tobattery
MIL illuminated
Yellow Checklamp illuminated
Abortedregeneration
Faulty harness
Actuator failure
FMI 4 ° Voltage below
normal, or shortedto low source
° Circuit shorted toground
MIL illuminated
Yellow Check
lamp illuminated
Abortedregeneration
Faulty harness
Actuator failure
FMI 5 ° Current belownormal or opencircuit
° Open circuit MIL illuminated
Yellow Checklamp illuminated
Abortedregeneration
Faulty harness
Actuator failure
FMI 7 ° Mechanical systemnot responding orout of adjustment
° Altertreatmenthydrocarbondoser fuelpressure too low
MIL illuminated
Yellow Checklamp illuminated
Regeneration notpossible
Fuel shut off valve stuck open
Faulty fuel pressure sensor
FMI14 ° Special instructions ° Aftertreatmenthydrocarbondoser fuelpressure too high
MIL illuminated
Yellow Checklamp illuminated
Regeneration notpossible
Fuel shut off valve leakage
ECM SPN 3480, Afle437/PSID 108
rtreatment DPF Fuel Pressure - MID 128 PPID
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Sy mp t o ms :
FMI 2 ° Data erratic,intermittent orincorrect
° DPF fuelpressure sensoris not rational(plausibility)
° Aftertreatment
hydrocarbon doserfuel pressure toolow
MIL illuminated
Yellow Checklamp illuminated
Regeneration notpossible
Faulty aftertreatment fuel shut off valve
Faulty DPF fuel pressure sensorAir in fuel
Fuel filter
Aftertreatment fuel pump
76
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FMI 3Voltage abovenormal orshorted tohigh source »
Short to battery onthe metering side
Open in theground line
MIL illuminated
Yellow Checklamp illuminated
Regeneration notpossible
° Faulty harness‘ Faulty DPF fuel pressure sensor
FMI 5 Current below °normal or opencircuit ¢
Open circuit in the5 volt supplyShort circuit toground in themetering line
Open circuit in themetering line
MIL illuminated
Yellow Checklamp illuminated
Regeneration notpossible
°Faulty harness
° Faulty DPF fuel pressure sensor
FMI 7 Mechanical system°
not responding orout ofadjustment
Mechanicalproblem
MIL illuminated
Engine derate
Possible engineshutdown
Regeneration notpossible
° Faulty aftertreatment hydrocarbondoser system
° Aftertreatment hydrocarbon doser° Faulty aftertreatment fuel shut off valve° Aflertreatment fuel pump
FM|10 Abnormal rate of 0
changeAftertreatmenthydrocarbondoserfuel pressuresensor stuck
Aftertreatmenthydrocarbon doserfuel pressure toohigh
MIL illuminated
Yellow Check
lamp illuminated
Regeneration notpossible
’ Faulty fuel pressure sensor° Faulty shut off valve° Aftertreatment hydrocarbon doser
(injector)
FMl15 Data valid but above °normal operatingrange -Least severelevel ¢
Fuel pressuresensor is out ofrangeSensor indicates ainvalid value
MIL illuminated ° Faulty fuel pressure sensor
ECM SPN 3483, Aftertreatment Regeneration Status - MID 128 PSID 47
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but above °normal operationalrange -Most severelevel
Unable toachieve neededaftertreatmenttemperature
MIL illuminated
Possibleincompleteregeneration
° Aftertreatment hydrocarbon doser
clogged° Aftertreatment hydrocarbon doser fuel
pressure too low
FMI 1 Data valid but below °normal operationalrange
Aftertreatmenttemperature toohigh
MIL illuminated
Possibleincompleteregeneration
° Aftertreatment hydrocarbon doser
clogged° Aftertreatment hydrocarbon doser fuel
pressure too high
FM|10 Abnormal rate of
changeRegenerationperiod too long
MIL illuminated
Regenerationfrequency toohigh
° Aftertreatment hydrocarbon doser
° Air leakage
77
Engine Control Module (ECM) Diagnostic TroubleG' °“p 28 codes (m o s )
FMI12 Bad intelligentdevice orcomponent
° Regenerationefficiency too low
° NIA ° Aftertreatment hydrocarbon doser
clogged° Diesel Particulate Filter (DPF) catalyst
damaged° Diesel Particulate Filter (DPF) catalyst
clogged
FMI13 Out of Calibration ° Regenerationperiod too long
MIL illuminated
Regenerationfrequency toohigh
° Aftertreatment hydrocarbon doser° Air leakage° Fuel line clogged
FM|15 Data valid but abovenormal operatingrange-Least severelevel
° Unable toachieve neededtemperature
MIL illuminated
Possible
incompleteregeneration
° Aftertreatment hydrocarbon doserclogged
° Aftertreatment hydrocarbon doser fuel
pressure too low
FMI 17 Data valid but belownormal operatingrange-Least severelevel
° Aftertreatmenttemperature toohigh
MIL illuminated
Possibleincompleteregeneration
° Aftertreatment hydrocarbon doser
clogged° Aftertreatment hydrocarbon doser fuel
pressure too high
FMI 31 Condition exists ° Regenerationperiod too long
MIL illuminated
Regenerationfrequency toohigh
° Aftertreatment hydrocarbon doser° Air leakage° Fuel line clogged
ECM SPN 3509, Sensor Supply Voltage 1-MID 128 SID 232
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:Possible Cause:
FM' 3 ° Voltage abovenormal, or shortedto high source
° Sensor supplyvoltage out ofrange (high)
MIL illuminated
Incorrect sensorvalues
° Faulty harness or connector
FMI 4 ° Voltage belownormal, or shortedto low source
° Sensor supplyvoltage out of
range (low)
MIL illuminated
Incorrect sensorvalues
° Faulty harness or connector
ECM SPN 3510, Sensor Supply Voltage 2 - MID 128 SID 211
Type of FMI Description: Fault Condition: Possiblefault: Symptoms:
Possible Cause:
FMI 3 ° Voltage above ° Circuit shorted +
normal, or shortedto high source
MIL illuminated
Incorrect sensorvalues
° Faulty harness or connector
Voltage belownormal, or shortedto low source
FM' 4 ° ° circuiisnoried- MIL illuminated
Incorrect sensorvalues
° Faulty harness orconnector
78
Engine Control Module (ECM) Diagnostic TroubleGroup 28 Codes (DTCs)
ECM SPN 3511, Sensor Supply Voltage 3 - MID 128 PSID 113
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
normal, or shortedto high source
FMI 3 ° Voltage above ° Circuit shorted + ’ MIL illuminated °Faulty hamess
normal, or shonedto low source
FMI4 ° Voltage below ° Circuit shorted- ° MIL illuminated °Faulty harness
ECM SPN 3512, Sensor Supply Voltage 4 - MID 128 PSID 126
fault:Type of FMI Description: Fault Condition: Possible 4Possible Caus e:
Symptoms:
FMI 3
normal, or shortedto high source
° Voltage above ° Sensor supplycircuit shorted +
° MIL illuminated ° Faulty hames s° Incorrect sensor
values
FM' 4 ° Voltage belownormal, or shortedto low source
° Sensor supplycircuit shorted -
° MIL illuminated ° Faulty harness° Incorrect sensor
values
ECM SPN 3522, Aftertreatment Tota Fuel Used -MID 128 PSID 91
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange
° AftertreatmentDiesel ExhaustFluid (DEF) levelchange too much
° N/A ° DEF system leak° Wrong DEF tank’ Aftertreatment DEF Dosing Module
failure or wrong module
FMI 1 Data valid but belownormal operationalrange
° AftertreatmentDiesel ExhaustFluid (DEF) levelchange too little
° N/A ° DEF tank level sensor stuck° DEF system clog° Wrong DEF tank° Aftertreatment DEF Dosing Module
failure or wrong module
FMI16 Data valid but abovenormal operatingrange -Moderatelysevere level
’ AftertreatmentDiesel ExhaustFluid (DEF) level
change too much
° N/A ° DEF system leak° Wrong DEF tank° Aftertreatment DEF Dosing Module
failure orwrong module
FMl18 Data valid but belownormal operatingrange -Moderatelysevere level
° AftertreatmentDiesel ExhaustFluid (DEF) level
change too little
° NIA ° DEF tank level sensor stuck° DEF system clog° Wrong DEF tank° Aftertreatment DEF Dosing Module
failure or wrong module
Engine Control Module (ECM) Diagnostic TroubleG'°"i’ 28 codes (mos)
ECM SPN 3556, Aftertreatment Hydrocarbon Doser- MID 128 PPID 329
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 ’ Voltage abovenormal, or shortedto high source
° Circuit shorted tobattery
° MIL illuminated° Yellow Check
lamp illuminated° Regeneration not
possible
°Faulty harness
° Aftertreatment hydrocarbon doserfailure
FMI 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted toground
° MIL illuminated° Yellow Check
lamp illuminated° Regeneration not
possible
°Faulty harness
° Aftertreatment hydrocarbon doserfailure
FMI 5 ° Current belownomial or opencircuit
° Open circuit ° MIL illuminated° Yellow Check
lamp illuminated’ Regeneration not
possible
° Faulty harness° Aftertreatment hydrocarbon doser
failure
FM|13 ° Out of calibration ° Aftertreatmenthydrocarbondoser clogged
° MIL illuminated ° Aftertreatment hydrocarbon doserfailure
° Fuel shut off valve° Fuel supply failure
FMI 14 ° Special instructions ° Aftertreatmenthydrocarbondoser leaking
° MIL illuminated° Yellow Check
lamp illuminated° Regeneration not
possible
° Aftertreatment hydrocarbon doserfailure
ECM SPN 3597, Aftertreatment Diesel Particulate Filter (DPF) Regenerationtoo Frequent- MID 128 PSID 119
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
normal, or shortedto high source
FMI 3 ° Voltage above ° Circuit shorted + ° MIL illuminated ' Faulty harness° Faulty connector° Aftertreatment DEF line heater 1 or 3
failure° Aftertreatment DEF pump assembly
failure° Aftertreatment DEF tank heating valve
failure° Aftertreatment Control Module (ACM)
80
Engine Control Module (ECM) Diagnostic TroubleG'°“" 28 codes (bros)
FMI 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted- ° MIL illuminated ° Faulty harness° Faulty connector° Aftertreatment DEF line heatert o r3
failure° Aftertreatment DEF pump assembly
failure° Aftertreatment DEF tank heating valve
failure° Aftertreatment Control Module (ACM)
FMI 5 ° Current belownormal or opencircuit
° Open circuit ° MIL illuminated ’ Faulty harness° Faulty connector° Aftertreatment DEF line heater 1 or 3
failure° Aftertreatment DEF pump assembly
failure° Aftertreatment DEF tank heating valve
failure° Aftertreatment Control Module (ACM)
ECM SPN 3675, Engine Turbocharger Compresso- MID 128 PPID 330r Bypass Valve Position
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted +’ Onloff valve can't
be activated
MIL illuminated
Yellow electronicmalfunction lampilluminated
Regeneration notpossible
High enginebraking without
request
Driveabilityaffected
° Faulty bypass valve solenoid° Faulty hamess° Faulty harness connector
FMI 4 ° Voltage below
normal, orshortedto low source
° Short circuit-° Valve constantly
activated
MIL illuminated
Yellow Checklamp illuminated
Major enginederate
Exhaust manifoldoverheating
Engine shut down
° Faulty bypass valve solenoid° Faulty harness° Faulty harness connector
81
Engine Control Module (ECM) Diagnostic TroubleG'°“‘° 28 codes ( mos )
FMI 5 ¢ Current belownormal or opencircuit
° Open circuit° On/off valve can’t
be activated
° MIL illuminated° Yellow Check
lamp illuminated° Regeneration not
possible° High engine
braking withoutrequest
° Driveabilityaffected
° Faulty bypass valve solenoid° Faulty harness° Faulty h ames s connector
FMI 7 Mechanical systemnot responding orout of adjustment
’ MechanicallyStuck
° On/off valve can’tbe activated
° MIL illuminated° Yellow Check
lamp illuminated° Regeneration not
possible’ High engine
braking without
request° Driveability
affected° Valve constantly
activated° Major engine
derate° Exhaust manifold
overheating° Engine shut down
° Leaking pipes° Faulty bypass valve solenoid
ECM SPN 3720, Aftertreatment DPF Ash Load Percent- MID 128 PPID 337
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
normal operationalrange -Most severelevel
FMIO ° Data valid but above ° Ash level too high° Yellow Check ° Need service, ash level is too high
lamp illuminated
ECM SPN 3936, Aftertreatment DPF System - MID 128 PSID 28
Type of FMI Description: Fault Condition:fault:
PossibleSymptoms:
Possible Caus e:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
AflertreatmentDPF differentialpressure sensorvalue too high
° MIL illuminated ° Aftertreatment DPF differential
pressure sensor° Aftertreatment particulate ilter
FMI 1 Data valid but belownormal operationalrange -Most severelevel
AftertreatmentDPF differential
pressure sensorvalue too low
° MIL illuminated ° Aftertreatment DPF differential
pressure sensor° Aftertreatment particulate filter
82
Engine Control Module (ECM) Diagnostic TroubleG'°“" 28 co d es (b ros )
ECM SPN 4094, NOx Limits Exceeded Due to Insufficient Diesel ExhaustFluid (DEF) Quality - MID 128 PSID 90
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Cause:
FMI 1 ° Data valid but belownormal operationalrange -Most severelevel
° AftertreatmentDiesel ExhaustFluid (DEF)dosingtoo low
° Yellow Checklamp illuminated
° Engine derate
° DEF quality° Aftertreatment DEF line clogged° Aftertreatment DEF doser° Aftertreatment control module failure
FM' 14 ° Special Instructions ° AftertreatmentDiesel ExhaustFluid (DEF) dosingtoo low
° Yellow Checklamp illuminated
’ Engine derate
° DEF quality’ Aftertreatment DEF line clogged° Aftertreatment DEF doser° Aftertreatment control module failure
FM' 18 ° Data valid but belownormal operatingrange -Moderatelysevere level
° AftertreatmentDiesel ExhaustFluid (DEF) dosingtoo low
° Yellow Checklamp illuminated
° Engine derate
° DEF quality° Aftertreatment DEF line clogged° Aftertreatment DEF doser° Aftertreatment control module failure
ECM SPN 4095, NOx Limits Exceeded Due to Interrupted Diesel Exhaust
Fluid (DEF) Dosing - MID 128 PSID 90
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
Fluid (DEF) Iowusage
FMI7 ° Mechanical system ° Dosing failure ° MIL illuminated ° DEF level
'wt ";sF:1°_’"dti"9 °t"° Aftertreatment ° Faulty DEF pump
°“° 3 WSm e " Diesel Exhaust ¢-
Leak in DEF hose
ECM SPN 4334, Afterteatment Diesel Exhaust Fluid (DEF) Dosing AbsolutePressure - MID 128 PPID 273
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
FMU ° Data valid but below ° DEF system° MIL illuminated ° DEF pump
normal operational leakage detected » NoAftertreatment » DEF hoseran e -Most sev re -|e 3| e
D'e_se| Exhaust ° Aftertreatment Diesel Exhaust FluidV
F'"‘f’ (DEF) (DEF) Doser (injector)dosing
83
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FMI 4Voltage belownormal, or shortedto low source
° Short Circuit- ° MIL illuminated ° DEF pump assembly° No Aftertreatment
Diesel ExhaustFluid (DEF)dosing
FMI 5 Current belownormal or opencircuit
° Short Circuit + ° MIL illuminated ° DEF pump assembly° Open Circuit ° Yellow Check
lamp illuminated° NoAftertreatment
Diesel ExhaustFluid (DEF)dosing
ECM SPN 4339, Aftertreatment SCR Feedback Control Status - MID 128PSID 90
fault:Type of FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
Adaptation toohigh
° N/A ° NOx sensor° Aftertreatment Diesel Exhaust Fluid
(DEF) dosing system failure
FMI 1 Data valid but belownormal operationalrange -Most severelevel
Adaptation too low ° NIA ° NOx sensor‘ Aftertreatment Diesel Exhaust Fluid
(DEF) dosing system failure° DEF quality
FMl1O Abnormal rate of
changeAdaptation toohigh
° N/A ’ NOx sensor° Aftertreatment Diesel Exhaust Fluid
(DEF) dosing system failure
FM|12 Bad intelligentdevice orcomponent
Adaptation too low ° N/A ° NOx sensor° Aftertreatment Diesel Exhaust Fluid
(DEF) dosing system failure° DEF quality
ECM SPN 4354, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1- MID 128 PSID 103
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
FMIS ° Voltage above ° Circuit shorted+ ° N/A ° Faulty harness
normal, or shorted » Fauny connectorto h' h s urclg O e ’ Aftertreatment DEF line heat ert
failure
84
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FM' 4 ° Voltage belownormal, or shortedto low source
° Circuit Shorted- ° N/A °° Faulty connector° Aftertreatment DEF line heater 1
failure
Faulty harness
FM' 5 ° Current belownormal or opencircuit
° Open circuit ° NIA ° Faulty harness° Faulty connector° Aftertreatment DEF line heater 1
failure
ECM SPN 4356, Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3- MID 128 PSID 102
Type of FMI Description:fault:
Fault Condition: Possible Possible Cause:
Symptoms:
FMI 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted + ° N/A °° Faulty connector° Aftertreatment DEF line heater 3
failure
Faulty harness
FM' 4 ° Voltage belownormal, or shortedto low source
° Circuit shorted- ° N/A ’ Faulty harness° Faulty connector° Aftertreatment DEF line heater 3
failure
FM' 5 ° Current belownormal or opencircuit
° Open circuit ° NIA ° Faulty harness°
Faulty connector° Aftertreatment DEF line heater 3
failure
ECM SPN 4374, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
Speed - MID 128 PSID 87
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
normal operationalrange -Most severelevel
FMI 1 ° Data valid but below ° Slow pump speed° MIL illuminated ° Faulty hamess° No Aftertreatment ° Faulty connector
Diese' Exhaust ° Aftertreatment DEF pump assemblyfailure
dosing
85
Engine Control Module (ECM) Diagnostic TroubleG'°“i’ 28 codes ( mos )
ECM SPN 4375, Aftertreatment Diesel Exhaust Fluid Pump (DEF) Drive
Percentage - MID 128 PSID 121
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Caus e:
FMI O Data valid but abovenormal operationalrange -Most severelevel
° Circuit shorted + MIL illuminated
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty hamess° Faulty connector° Aftertreatment DEF pump assembly
failure
FMl 1 Data valid but belownormal operationalrange -Most severelevel
’ Circuit shorted -’ Open circuit
MIL illuminated
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty harness° Faulty connector° Aftertreatment DEF pump assembly
failure
FMI 3Voltage abovenormal, or shortedto high source
° Circuit shorted + MIL illuminated
NoAftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty hamess° Faulty connector° Aftertreatment DEF pump assembly
failure
FMI 4Voltage belownormal, orshortedto low source
° Circuit shorted - MIL illuminated
NoAftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty harness° Faulty connector° Aftertreatment DEF pump assembly
failure
FMI 5 Current belownormal oropencircuit
° Open circuit MIL illuminated
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
’ Faulty hamess° Faulty connector° Aftertreatment DEF pump assembly
failure
FMl12 Bad intelligentdevice orcomponent
° Open circuit MIL illuminated
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty hamess°
Faulty connector° Aftertreatment DEF pump assembly
failure
FMI14Special instructions ° Voltage to pump
out of rangeMIL illuminated
No AftertreatmentDiesel ExhaustFluid (DEF)dosing
° Faulty harness° Faulty connector° Aftertreatment DEF pump assembly
failure
86
Engine Control Module (ECM) Diagnostic Trouble
Group 28 Codes (DTCs)
ECM SPN 4376, Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve- MID 128 PSID 105
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Caus e:
FMI 3Voltage abovenormal, or shortedto high source
Circuit shorted + ° MIL illuminated° Not possible to
perfom1 afterrun
Faulty hamess
Faulty connectorAftertreatment DEF pump assemblyfailure
FMI 4Voltage belownormal, or shortedto low source
Circuit shorted -Open circuit
° MIL illuminated° Not possible to
perform afterrun
Faulty hamess
Faulty connectorAftertreatment DEF pump assemblyfailure
FMI 5 Current belownormal or opencircuit
Open circuit ° MIL illuminated° Not possible to
perform afterrun
Faulty harness
Faulty connectorAftertreatment DEF pump assemblyfailure
FMI 7 Mechanical systemnot responding orout of adjustment
Possiblemechanicalproblem withaftertreatmentdiesel exhaustfluid (DEF) retumvalve
° MIL illuminated° Not possible to
perfom1 afterrun
Mechanical fau l t - DEF return line
restricted between DEF pump andDEF tank
Aftertreatment Diesel Exhaust Fluid
(DEF) pump assembly
ECM SPN 4752, Engine Exhaust Gas Recirculation (EGR) Cooler Efficiency- MID 128 SID 282
Type offault:
FMI Description: Fault Condition: Possible Possible Cause:
Symptoms:
FMI 7 ° Mechanical systemnot responding orout of adjustment
Low EGR coolerefficiency
° MIL illuminated ’ EGR cooler clogged or damaged
ECM SPN 4811, Engine Piston Coo ng Oil Pressure - MID 128 PPID 8
fault:Type of 4FMI Description: 4Fault Condition: Possible `Possible Cause:
Symptoms:
FMI 1 ¢ - ,Data valid but below Pressure below
normal operational rangerange -Most severelevel
’ Red Stop lamp ° N/A
illuminated
Group 28Engine Control Module (ECM) Diagnostic Trouble
Codes (DTCs)
FM' 3 ° Voltage abovenormal or shorted tohigh source
metering lineShort to battery in Yel|owCheck|amp
°Faulty hames s
illuminated
FM' 5 ° Current belownormal or opencircuit
° Open in themetering sidesensor circuit
circuit
Open circuit in the
ground line sensor
YellowChecklamp° Faulty sensor
illuminated °Faulty harness
ECM SPN 4813, Engine Oil Thermostat Bypass Valve Opening - MID 128PSID 72
Type of FMI Description:fault:
Fault Condition: Possible Possible Cause:Symptoms:
FN" 3 ° Voltage abovenormal, or shortedto high source
° Circuit shorted + Yellow Check
lamp illuminated
Oil them1ostat is
always open
° Faulty actuator’ Faulty hames s
FM' 4 ° Voltage belownormal, or shortedto low source
‘ Circuit shorted - Yellow Checklamp illuminated
Oil thennostat isalways closed
Engine mayoverheat
° Faulty actuator° Faulty hamess
FM' 5 ° Current belownormal or opencircuit
° Open circuit Yellow Checklamp illuminated
Oil thermostat is
always open
May haveincreased fuelconsumption
e
° Faulty actuator° Faulty hames s
ECM SPN 4815, Engine Cooling Fan Thermal Switch Position - MID 128PPID 333Type of FMI Description: Fault Condition: Possible Possible Cau s e:
fault: Symptoms:
FN" 3 ° Voltage above ° Circuit shorted to ° Yellow Check ° Faulty harness
to high source ° Faulty sensornormal, or shorted battery lamp illuminated » Fauny hames s Connector
88
Engine Control Module (ECM) Diagnostic Trouble
G'°“P 28 codes (ores)
to low source
FMI 4 ° Voltage below ° Short circuit- ° Yellow Check
° Faulty sensor
FM' 5 ° Current below ° Open circuit ° Yellow Check ° Faulty harness
non'nal or open lamp Illuminated ¢ Fauny harness connectorcircuit
° Faulty harness
"°"“a|- 0' Shmed ' amp Hmminated ° Faulty hames s connector
° Faulty sensor
ECM SPN 5246, Aftertreatment SCR Operator inducement Severity - MID
128 PSID 46
fault:Type of FMI Description: Possible Possible Cause:
Symptoms:Fault Condition:
FMI 0 Data valid but abovenomial operationalrange -Most severelevel
° Severe SCRsystem faultdetected -Warning fault
° Severe engine ° N/Aderate
FM|15 Data valid but abovenormal operatingrange -Least severelevel
° Moderate SCR
system faultdetected -Warning fault
° Moderate engine° N/A
derate
FM|16 Data valid but abovenormal operatingrange -Moderatelysevere level
° SCR systemfault detected -Waming fault
° Engine derate ° N/A
89
Engine Control Module (ECM) Diagnostic Trouble
G' °“p 28 codes ( or cs)
ECM SPN 5285, Charge Air Cooler (CAC) Temperature -MID 128 PID 52
Type of FMI Description: Fault Condition: Possible Possible Cause:
fault: Symptoms:
not respondingproperly
too high
FMI7 ° Mechanical system° Boosttemperature ° MIL illuminated ° Air flow through charge air cooler
(CAC) too low° Charge air cooler (CAC)
normal operatingrange
too high
FM' 18 ° Data valid but below ° Boosttemperature ° MIL illuminated ’ Air tlow through charge air cooler
(CAC) too low° Charge air cooler (CAC)
ECM SPN 5298, Aftertreatment Diesel Oxidation Catalyst (DOC) Conversion
Efficiency - MID 128 PSID 99
Type of FMI Description:fault:
Fault Condition: PossibleSymptoms:
Possible Caus e:
FM' 7 ° Mechanical systemnot respondingproperly
Hydrocarbonconversion is toolow in the DieselOxidation Catalyst(DOC)
° MIL illuminated ° Catalyst failure‘ DOC temperature sensor
FM' 18 ° Data valid but belownormal operatingrange -Moderatelysevere level
Hydrocarbonconversion ls toolow in the DieselOxidation Catalyst(DOC)
° MIL illuminated ° Catalyst failure° DOC temperature sensor
ECM SPN 5392, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve
_ O S S of Prime - MID 128 PSID 121
Type offault:
FMI Description: Fault Condition: PossibleSymptoms:
Possible Caus e:
FM' 7 ° Mechanical systemnot respondingproperly
AftertreatmentDiesel ExhaustFluid (DEF)pressure buildup failure
‘ MIL illuminated° Yellow Check
lamp illuminated° No Aftertreatment
Diesel ExhaustFluid (DEF)dosing
° Empty DEF tank° DEF filter clogged° DEF inlet pipe leak or blockage° DEF pump assembly
FMI 31 ° Condition exists AftertreatmentDiesel ExhaustFluid (DEF)pressure buildup failure
° MIL illuminated° Yellow Check
lamp illuminated° No Aftertreatment
Diesel ExhaustFluid (DEF)dosing
° Empty DEF tank° DEF filter clogged’ DEF inlet pipe leak or blockage° DEF pump assembly
90
Engine Control Module (ECM) Diagnostic TroubleG'°“'° 28 codes (m o s )
ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve- MID 128 PSID 89
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0 Data valid but abovenormal operationalrange -Most severelevel
° Low side circuitshorted to +
° MIL illuminated ° Aftertreatment DEF dosing pumpassembly
FMI 1 Data valid but belownormal operationalrange -Most severelevel
° Short to ground° Low side circuit
open
’ MIL illuminated ° Aftertreatment DEF dosing pumpassembly
FMI 3 Voltage abovenormal, orshortedto high source
° Circuit shorted + ° MIL illuminated ° Aftertreatment DEF dosing pumpassembly
FMI 4Voltage belownormal, or shortedto low source
’ Circuit shorted - ° MIL illuminated ° Aftertreatment DEF dosing pumpassembly
FMI 5 Current belownormal or opencircuit
° Open circuit ° MIL illuminated’ Yellow Check
lamp illuminated
° Aftertreatment DEF doser° Aftertreatment DEF dosing pump
assembly
FMI14Diesel ExhaustFluid (DEF) Doserclogged orhoseclogged
° MIL illuminated° Yellow Check
lamp illuminated
° Afleitreatment Diesel Exhaust Fluid
(DEF) Doser clogged° Hose clogged
ECM SPN 5394, Afte- MID 128 PSID 90
Special instructions ° Aftertreatment
rtreatment Diesel Exhaust Fluid (DEF) Dosing Valve
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 1 Data valid but belownormal operationalrange
° Dosing failure° Aftertreatment
Diesel ExhaustFluid (DEF) dosingamount too low orDEF quality
° MIL illuminated° NOx emissions
too high
° NOx sensor° SCR catalyst malfunction° EGR mass flow failure° SCR inlet temperature sensor
FMI17 Data valid but belownormal operatingrange -Least severelevel
° Dosing failure° Aftertreatment
Diesel ExhaustFluid (DEF)dosingamount too low orDEF quality
° MIL illuminated° NOx emissions
too high
° NOx sensor° SCR catalyst malfunction° EGR mass flow failure° SCR inlet temperature sensor
91
»
Engine Control Module (ECM) Diagnostic TroubleG' °"p 28 codes ( or cs)
ECM SPN 5485, Aftertreatment Diesel Exhaust Fluid (DEF) Pump Orifice- MID 128 PSID 121
fault:Type of FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FM' 11 ° Root cause notknown
AftertreatmentDiesel ExhaustFluid (DEF) bleedoritice clogged
° MIL illuminated° Yellow Check
lamp illuminated’ No Aftertreatment
Diesel ExhaustFluid (DEF)dosing
° Bleed orifice° Aftertreatment Diesel Exhaust Fluid
(DEF) pressure sensor
92