Powertrain fault codes
14821 Powertrain OBD-II fault codes: what each one means, and how to track it down.
How to read a code
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 4
- AreaAuxiliary emission controls
- 20
- FaultThe specific fault in that area
Read the code
Note every stored and pending code your scanner shows, such as P0420.
Find it
Search by code or by words. For a manufacturer code (P1, B1, C1, U1) pick your make: its meaning differs by make.
Open the code
Its page explains the symptoms, likely causes, the checks to run and the fixes.
- P05F4Generic · PowertrainExhaust Aftertreatment Power Relay Control Circuit Low
- P05F5Generic · PowertrainExhaust Aftertreatment Power Relay Control Circuit High
- P05F6Generic · PowertrainExhaust Aftertreatment Power Relay Control Circuit Stuck On
- P05F7Generic · PowertrainExhaust Aftertreatment Power Relay Control Circuit Stuck Off
- P05F8Generic · PowertrainReductant Heater Control Module Performance
- P05F9Generic · PowertrainStop-Start Status Signal Circuit
- P05FAGeneric · PowertrainStop-Start Status Signal Circuit Low
- P05FBGeneric · PowertrainStop-Start Status Signal Circuit High
- P05FCGeneric · PowertrainCold Start Fuel Pressure Performance Bank 2
- P05FDGeneric · PowertrainTurbocharger/Supercharger Boost Control A Temperature Too High
- P05FEGeneric · PowertrainActive Grille Air Shutter C Performance/Stuck Off
- P05FFGeneric · PowertrainBrake Pressure Sensor / Brake Pedal Position Sensor Correlation
- P0600Generic · PowertrainSerial Communication Link
- P0600Audi · PowertrainDefective PCM (Power Train Control Module), Defective PCM data bus wiring/connections, Defective PCM data bus ground circuit(s), Defective PCM or other control module controlled output devices, Defective CAN bus communication
- P0601Generic · PowertrainInternal Control Module Memory Checksum Error
- P0601Audi · PowertrainLack of proper voltage to the PCM, Defective PCM memory module, Defective PCM ground circuit(s), Defective PCM controlled output devices
- P0601Dodge · PowertrainInternal PCM Controller Failure
- P0602Generic · PowertrainControl Module Programming Error
- P0602Audi · PowertrainPowertrain Control Module (PCM) failure, Wiring issue
- P0603Generic · PowertrainInternal Control Module Keep Alive Memory (KAM) Error
- P0603Audi · PowertrainLack of proper voltage to the Keep Alive Memory connection on the PCM, Defective PCM Keep Alive Memory Module (KAM), Defective PCM ground circuit(s), Defective PCM controlled output devices
- P0604Generic · PowertrainInternal Control Module Random Access Memory (RAM) Error
- P0605Generic · PowertrainInternal Control Module Read Only Memory (ROM) Error
- P0605Audi · PowertrainLack of proper voltage and or ground to the PCM, Defective PCM ROM memory module, Defective PCM ground circuit(s), Defective PCM controlled output devices
- P0606Generic · PowertrainControl Module Processor
- P0607Generic · PowertrainControl Module Performance
- P0608Generic · PowertrainControl Module VSS Output A
- P0609Generic · PowertrainControl Module VSS Output B
- P060AGeneric · PowertrainInternal Control Module Monitoring Processor Performance
- P060BGeneric · PowertrainInternal Control Module A/D Processing Performance