DTC codes
Look up an OBD-II fault code: what it means on every car or on your make, 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.
- P05FEGeneric · PowertrainActive Grille Air Shutter C Performance/Stuck Off
- P05FFGeneric · PowertrainBrake Pressure Sensor / Brake Pedal Position Sensor Correlation
- P0600Generic · PowertrainSerial Communication Link
- P0601Generic · PowertrainInternal Control Module Memory Checksum Error
- P0602Generic · PowertrainControl Module Programming Error
- P0603Generic · PowertrainInternal Control Module Keep Alive Memory (KAM) Error
- P0604Generic · PowertrainInternal Control Module Random Access Memory (RAM) Error
- P0605Generic · PowertrainInternal Control Module Read Only Memory (ROM) Error
- 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
- P060CGeneric · PowertrainInternal Control Module Main Processor Performance
- P060DGeneric · PowertrainInternal Control Module Accelerator Pedal Position Performance
- P060EGeneric · PowertrainInternal Control Module Throttle Position Performance
- P060FGeneric · PowertrainInternal Control Module Coolant Temperature Performance
- P0610Generic · PowertrainControl Module Vehicle Options Error
- P0611Generic · PowertrainFuel Injector Control Module Performance
- P0612Generic · PowertrainFuel Injector Control Module Relay Control
- P0613Generic · PowertrainTCM Processor
- P0614Generic · PowertrainECM/TCM Incompatible
- P0615Generic · PowertrainStarter Relay A Circuit
- P0616Generic · PowertrainStarter Relay A Circuit Low
- P0617Generic · PowertrainStarter Relay A Circuit High
- P0618Generic · PowertrainAlternative Fuel Control Module KAM Error
- P0619Generic · PowertrainAlternative Fuel Control Module RAM/ROM Error
- P061AGeneric · PowertrainInternal Control Module Torque Performance
- P061BGeneric · PowertrainInternal Control Module Torque Calculation Performance