ECM Diagnostic Trouble Codes

NOTE: Before replacing the ECM for a failed driver, control circuit or ground circuit, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most ECM driver/control circuit failures are caused by internal failures to components (i.e. relays and solenoids) and shorted circuits (i.e. sensor pull-ups, drivers and ground circuits). These faults are difficult to detect when a double fault has occurred and only one DTC has set.

If the DRBIII® displays faults for multiple components (i.e. MAF, ECT, ENG OIL, etc.), identify and check the shared circuits for possible problems before continuing (i.e. sensor grounds or 5-volt supply circuits). Refer to the appropriate wiring diagrams to identify shared circuits.

boost pressure sensor - signal voltage too high

boost pressure sensor - can message error

boost pressure sensor - plausibility

intake air temperature sensor - signal voltage too high

intake air temperature sensor - signal voltage too low

engine coolant temperature sensor - signal voltage too high

engine coolant temperature sensor - signal voltage too low

engine coolant temperature sensor - plausibility

engine coolant temperature sensor - plausibility with engine oil sensor

fuel temperature sensor - signal voltage too high

fuel temperature sensor - signal voltage too low

fuel pressure sensor - signal voltage too high

fuel pressure sensor - signal voltage too low

cylinder 1 injector - short to voltage

cylinder 1 injector - excessive current

cylinder 1 injector - open or short to ground

cylinder 2 injector - short to voltage

cylinder 2 injector - excessive current

cylinder 2 injector - open or short to ground

cylinder 3 injector - short to voltage

cylinder 3 injector - excessive current

cylinder 3 injector - open or short to ground

cylinder 4 injector - short to voltage

cylinder 4 injector - excessive current

cylinder 4 injector - open or short to ground

cylinder 5 injector - short to voltage

cylinder 5 injector - excessive current

cylinder 5 injector - open or short to ground

misfire detection - cylinder misfire

wheel speed sensor - can data bus message from ABS plausibility

can data bus - can bus circuit fault

atmospheric pressure sensor - signal voltage too high

atmospheric pressure sensor - signal voltage too low

accel pedal position sensor #1 - signal voltage is too high

accel pedal position sensor #1 - signal voltage is too low

accel pedal position sensor #1 - plausibility

accel pedal position sensor #2 - signal voltage is too high

accel pedal position sensor #2 - signal voltage is too low

accel pedal position sensor #2 - plausibility

glow plug module - excessive current

glow plug module - incorrect timer

glow plug module - communication error

glow plug module - internal fault

engine control relay - shuts off too early

engine control relay - shuts off too late

sensor reference voltage 1 circuit - voltage too high

sensor reference voltage 1 circuit - voltage too low

ignition voltage - voltage error

ECM - voltage supply is too high ECM - read/write error

ECM - read error

ECM - write error

ECM - incorrect value

immobilizer fault - ECM error

immobilizer -

immobilizer - authentication error

immobilizer - incorrect key

ACM circuit fault

fuel pressure sensor - signal voltage too high

fuel pressure sensor - signal voltage too low

water in fuel sensor - missing signal

water in fuel sensor - water in fuel

engine oil sensor - signal voltage too high

engine oil sensor - signal voltage too low

engine oil sensor - oil temperature plausibility

engine oil sensor - plausibility

fuel rail pressure monitoring - maximum fuel flow

quantity exceeded

fuel rail pressure monitoring - fuel flow below

specified minimum quantity

fuel rail pressure monitoring - rail pressure too low

fuel rail pressure monitoring - rail pressure too high

fuel rail pressure monitoring - maximum pressure exceeded

fuel rail pressure monitoring - rail pressure too low

fuel rail pressure monitoring - rail pressure too high

intake pressure sensor - signal voltage too high

intake pressure sensor - signal voltage too low

intake pressure sensor - plausibility with atmospheric pressure sensor

engine oil sensor - oil level out of range

engine oil sensor - invalid oil level

engine oil sensor - oil level out of range

engine oil sensor - quality error

engine oil sensor - oil quality out of range

engine oil sensor - oil quality plausibility

engine oil sensor - water contamination

camshaft position sensor - open circuit

camshaft position sensor - open or short circuit

camshaft position sensor - signal missing

camshaft position sensor - signal plausibility

fuel rail pressure monitoring - rail pressure too high

fuel rail pressure monitoring - deceleration error

fuel rail pressure monitoring - rail pressure too high

O2 sensor - signal voltage too high

engine oil sensor - open circuit

engine oil sensor - signal error

engine oil sensor - synchronization error engine oil

sensor - monitoring error

intake air temperature sensor - signal voltage too high

intake air temperature sensor - signal voltage too low

mass air flow sensor - supply voltage too high

mass air flow sensor - supply voltage too low

mass air flow sensor - air mass to high

mass air flow sensor - air mass too low

mass air flow sensor - signal voltage too high

mass air flow sensor - signal voltage too low

mass air flow sensor - signal circuit open or shorted

mass air flow sensor - signal ratio too high

mass air flow sensor - signal ratio too low

mass air flow sensor - reference voltage plausibility

O2 sensor - signal error

O2 sensor - plausibility

O2 sensor - O2 level too low

O2 sensor - signal plausibility

fuel pump relay - short to voltage

fuel pump relay - short to ground

fuel pump relay - open circuit

fuel pump relay - excessive current

starter relay circuit - short circuit

boost pressure solenoid - short circuit

boost pressure solenoid - open circuit

boost pressure solenoid - excessive current

misfire detection - cylinder #1 misfire

misfire detection - cylinder #2 misfire

misfire detection - cylinder #3 misfire

misfire detection - cylinder #4 misfire

misfire detection - cylinder #5 misfire

engine shut off - internal fault

engine shut off - voltage error #1

engine shut off - voltage error #2

injector actuation - short to ground or voltage

injector actuation - low side short to ground

injector actuation - general fault

injector actuation - short to ground or voltage

injector actuation - low side short to ground

injector actuation - general fault

glow plug preglow - open or short to voltage

glow plug preglow - short to ground

glow plug preglow - excessive current

glow plug cylinder #1 - open or shorted to voltage

glow plug cylinder #2 - open or shorted to voltage

glow plug cylinder #3 - open or shorted to voltage

glow plug cylinder #4 - open or shorted to voltage

glow plug cylinder #5 - open or shorted to voltage

ECM - injector control

cylinder injector #1 - open circuit cylinder injector #2 - open circuit

cylinder injector #3 - open circuit

cylinder injector #4 - open circuit

cylinder injector #5 - open circuit

fuel pressure solenoid - plausibility

starter relay circuit - short to ground

starter relay circuit - open or short to voltage

starter relay circuit - excessive current

fuel shutdown solenoid - open circuit

fuel shutdown solenoid - excessive current

fuel shutdown solenoid - short to voltage

fuel shutdown solenoid - short to ground

torque reduction message from ABS - message error

torque reduction message from ABS - can plausibility

torque reduction message from ABS - torque request message error

torque reduction message from ABS - message missing

torque reduction message from TCM - message incomplete

torque reduction message from TCM - can plausibility

torque reduction message from TCM - torque request message error

torque reduction message from TCM - plausibility

can bus message - brake signal plausibility #1

can bus message - brake signal plausibility #2

can bus message - ABS/ESP message missing or incorrect

can bus message - shifter module error

can bus message - TCM error

can bus message - message transmission error

TCM DTC - internal fault

TCM DTC - 2-3 solenoid fault

TCM DTC - 3-4 solenoid fault

TCM DTC - torque converter solenoid fault

TCM DTC - modulating pressure solenoid fault

TCM DTC - shift pressure solenoid fault

TCM DTC - valve voltage supply fault

TCM DTC - speed sensor voltage supply fault

TCM DTC - SCREEM can message fault

TCM DTC - rear wheel speed plausibility

TCM DTC - incorrect transmission ratio

TCM DTC - can message plausibility

TCM DTC - TCC excessive power consumption fault

TCM DTC - fault code error

TCM DTC - gear comparison fault

ABS/ESP message - external quantity control fault

steering angle sensor can message - plausibility #1

steering angle sensor can message - plausibility #2

steering angle sensor can message - plausibility #3

steering angle sensor can message - plausibility #4

can bus message - message missing

can bus message - instrument cluster plausibility-lateral accelerator sensor - plausibility

steering angle sensor can message - plausibility

can bus message - TCM fault

can bus message - TCM message missing

sensor reference voltage 2 circuit - voltage too high

sensor reference voltage 2 circuit - voltage too low

ECM - internal fault

crankshaft position sensor - plausibility

ECM - internal fault

ECM injector monitoring - undervoltage

ECM injector monitoring - internal fault

ECM - internal fault

accelerator pedal position sensor - plausibility

ECM - internal fault

sensor reference voltage 3 circuit - voltage too high

sensor reference voltage 3 circuit - voltage too low

speed control - vehicle speed plausibility

speed control - excessive acceleration

speed control - excessive deceleration

ECM - checksum error

ECM - invalid data

ECM - invalid coding

ECM - internal fault

crankshaft position sensor - plausibility

kickdown switch - plausibility

ECM coding error - manual transmission coded as auto transmission

ECM coding error - auto transmission coded as manual transmission

ECM coding error - write to EEPROM error

ECM coding error - can bus circuit interruption

ECM internal voltage error - voltage too high

ECM internal voltage error - voltage too low

injection fault - torque limit

injection fault - quantity error

injection fault - excessive engine speed

O2 sensor - plausibility

ECM - internal fault

EGR valve - flow rate too high

EGR valve - flow rate too low ECM - internal fault

ECM - internal fault

boost pressure - boost pressure too low

boost pressure - boost pressures too high

O2 sensor - circuit fault

fuel shutdown solenoid - open circuit

fuel shutdown solenoid - excessive current

fuel shutdown solenoid - short to voltage

boost pressure solenoid - short to ground

boost pressure solenoid - unknown error

EGR valve circuit - short to ground

inlet port shutoff - short to ground

crankcase vent heater - short to ground

crankcase vent heater - short to voltage

crankcase vent heater - open circuit

crankcase vent heater - excessive current

start attempt - improper start attempt

boost pressure solenoid - short to voltage

boost pressure solenoid - short to ground

boost pressure solenoid - open circuit

boost pressure solenoid - excessive current

EGR valve circuit - short to voltage

EGR valve circuit - short to ground

EGR valve circuit - open circuit

EGR valve circuit - excessive current

inlet port shutoff - short to voltage

inlet port shutoff - short to ground

inlet port shutoff - open circuit

inlet port shutoff - excessive current

injector #1 quantity calibration - too large

injector #1 quantity calibration - too small

injector #1 quantity calibration - to large

injector #1 quantity calibration - too small

injector #2 quantity calibration - too large

injector #2 quantity calibration - too small

injector #2 quantity calibration - too large

injector #2 quantity calibration - too small

injector #3 quantity calibration - too large

injector #3 quantity calibration - too small

injector #3 quantity calibration - too large

injector #3 quantity calibration - too small

injector #4 quantity calibration - too large

injector #4 quantity calibration - too small

injector #4 quantity calibration - too large

injector #4 quantity calibration - too small

injector #5 quantity calibration - too large

injector #5 quantity calibration - too small

injector #5 quantity calibration - too large

injector #5 quantity calibration - too small glow plug

preglow - short to voltage

glow plug preglow - short to ground

glow plug preglow - error

glow plug module - time error

glow plug module - communication error

glow plug module - excessive temperature error

CMP/CKP position sensor - sync error

mass air flow sensor - plausibility