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.
- P1521Chevrolet · PowertrainTransmission Engaged At High Throttle Angle
- P1521Chrysler · PowertrainTransmission Engaged At High Throttle Angle
- P1521GM · PowertrainTransmission Engaged At High Throttle Angle
- P1521GMC · PowertrainTransmission Engaged At High Throttle Angle
- P1521Oldsmobile · PowertrainTransmission Engaged At High Throttle Angle
- P1521Other · PowertrainVariable Intake Solenoid #1 Circuit Malfunction
- P1521Saturn · PowertrainTransmission Engaged At High Throttle Angle
- P1521Volkswagen · PowertrainIntake Manifold Changeover Valve 2 Circuit Electrical Malfunction
- P1522BMW · PowertrainA Camshaft Position Actuator Bank 2
- P1522Buick · PowertrainPark/Neutral To Drive/Reverse At High RPM
- P1522Cadillac · PowertrainPark/Neutral To Drive/Reverse At High RPM
- P1522Chevrolet · PowertrainPark/Neutral To Drive/Reverse At High RPM
- P1522Chrysler · PowertrainPark Neutral To Drive Reverse At High RPM
- P1522GM · PowertrainPark Neutral To Drive Reverse At High RPM
- P1522GMC · PowertrainPark Neutral To Drive Reverse At High RPM
- P1522Oldsmobile · PowertrainPark Neutral To Drive Reverse At High RPM
- P1522Other · PowertrainVariable Intake Solenoid #2 Circuit Malfunction
- P1522Saturn · PowertrainPark Neutral To Drive Reverse At High RPM
- P1522Volkswagen · PowertrainIntake Camshaft Control Bank 2 Malfunction
- P1523BMW · PowertrainA Camshaft Position Actuator Signal Low Bank 1
- P1523Buick · PowertrainElectronic Throttle Control Throttle Return
- P1523Cadillac · PowertrainElectronic Throttle Control Throttle Return
- P1523Chevrolet · PowertrainElectronic Throttle Control Throttle Return
- P1523Chrysler · PowertrainElectronic Throttle Control Throttle Return
- P1523GM · PowertrainElectronic Throttle Control Throttle Return
- P1523GMC · PowertrainElectronic Throttle Control Throttle Return
- P1523Kia · PowertrainVICS Solenoid Valve
- P1523Oldsmobile · PowertrainElectronic Throttle Control Throttle Return
- P1523Other · PowertrainIVC Solenoid Circuit Malfunction
- P1523Saturn · PowertrainElectronic Throttle Control Throttle Return