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.
- P2AD6Generic · PowertrainReductant Pump Motor Position Sensor Circuit
- P2AD7Generic · PowertrainReductant Pump Motor Position Sensor Circuit Range/Performance
- P2AD8Generic · PowertrainReductant Pump Motor Position Sensor Circuit Low
- P2AD9Generic · PowertrainReductant Pump Motor Position Sensor Circuit High
- P2ADAGeneric · PowertrainReductant Tank Temperature Sensor B Circuit Range/Performance
- P2ADBGeneric · PowertrainReductant Tank Temperature Sensor B Circuit Low
- P2ADCGeneric · PowertrainReductant Tank Temperature Sensor B Circuit High
- P2ADDGeneric · PowertrainReductant Tank Temperature Sensor B Circuit Intermittent/Erratic
- P2ADEGeneric · PowertrainReductant Tank Temperature Sensor B Circuit
- P2ADFGeneric · PowertrainIntake Air System Leak Bank 2
- P2AE0Generic · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit Open Bank 1
- P2AE1Generic · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit Low Bank 1
- P2AE2Generic · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit High Bank 1
- P2AE3Generic · PowertrainIntake Air O2 Sensor Pumping Current Circuit Open Bank 1
- P2AE4Generic · PowertrainIntake Air O2 Sensor Pumping Current Circuit Low Bank 1
- P2AE5Generic · PowertrainIntake Air O2 Sensor Pumping Current Circuit High Bank 1
- P2AE6Generic · PowertrainIntake Air O2 Sensor Negative Current Control Circuit Open Bank 1
- P2AE7Generic · PowertrainIntake Air O2 Sensor Negative Current Control Circuit Low Bank 1
- P2AE8Generic · PowertrainIntake Air O2 Sensor Negative Current Control Circuit High Bank 1
- P2AE9Generic · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit Open Bank 2
- P2AEAGeneric · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit Low Bank 2
- P2AEBGeneric · PowertrainIntake Air O2 Sensor Pumping Current Trim Circuit High Bank 2
- P2AECGeneric · PowertrainIntake Air O2 Sensor Pumping Current Circuit Open Bank 2
- P2AEDGeneric · PowertrainIntake Air O2 Sensor Pumping Current Circuit Low Bank 2
- P2AEEGeneric · PowertrainIntake Air O2 Sensor Pumping Current Circuit High Bank 2
- P2AEFGeneric · PowertrainIntake Air O2 Sensor Negative Current Control Circuit Open Bank 2
- P2AF0Generic · PowertrainIntake Air O2 Sensor Negative Current Control Circuit Low Bank 2
- P2AF1Generic · PowertrainIntake Air O2 Sensor Negative Current Control Circuit High Bank 2
- P2AF2Generic · PowertrainStarter Relay C Control Circuit/Open
- P2AF3Generic · PowertrainStarter Relay C Control Circuit Low