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.
- P1519GMC · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Honda · PowertrainIAC Valve Circuit Failure
- P1519Infiniti · PowertrainIAC Valve Circuit Failure
- P1519Lincoln · PowertrainIntake Manifold Runner Control Stuck Open
- P1519Mercury · PowertrainIntake Manifold Runner Control Stuck Open
- P1519Oldsmobile · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Other · PowertrainIntake Manifold Runner Control (Stuck Closed)
- P1519Saturn · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Volkswagen · PowertrainIntake Camshaft Control Bank 1 Malfunction
- P1520BMW · PowertrainB Camshaft Position Actuator Bank 1
- P1520Buick · PowertrainGear Indicator System
- P1520Cadillac · PowertrainGear Indicator System
- P1520Chevrolet · PowertrainGear Indicator System
- P1520Chrysler · PowertrainGear Indicator System
- P1520Ford · PowertrainIntake Manifold Runner Control Circuit Fault
- P1520Geo · PowertrainStop Lamp Switch Circuit
- P1520GM · PowertrainGear Indicator System
- P1520GMC · PowertrainGear Indicator System
- P1520Lexus · PowertrainStop Lamp Switch Malfunction
- P1520Lincoln · PowertrainIntake Manifold Runner Control Circuit Fault
- P1520Mercedes-Benz · PowertrainCruise Control Switch S40
- P1520Mercury · PowertrainIntake Manifold Runner Control Circuit Fault
- P1520Oldsmobile · PowertrainGear Indicator System
- P1520Other · PowertrainIntake Manifold Runner Control Circuit Malfunction
- P1520Saturn · PowertrainGear Indicator System
- P1520Subaru · PowertrainRadiator Fan Relay 1 Circuit High Input
- P1520Toyota · PowertrainStop Lamp Switch Signal Malfunction
- P1520Volkswagen · PowertrainIntake Manifold Changeover Valve 2 Circuit Open
- P1521Buick · PowertrainTransmission Engaged At High Throttle Angle
- P1521Cadillac · PowertrainTransmission Engaged At High Throttle Angle