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.
- P1517Lincoln · PowertrainIntake Manifold Runner Control Input Error
- P1517Mazda · PowertrainCranking Neutral Drive Fault
- P1517Mercury · PowertrainIntake Manifold Runner Control Input Error
- P1517Oldsmobile · PowertrainThrottle Actuator Control TAC Module Performance
- P1517Other · PowertrainIMRC Input Error (Bank 2)
- P1517Saturn · PowertrainThrottle Actuator Control TAC Module Performance
- P1517Subaru · PowertrainIdle Air Control Solenoid Signal 4 Circuit High Input
- P1517Volkswagen · PowertrainMain Relay Circuit Electrical Malfunction
- P1518Buick · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518Cadillac · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518Chevrolet · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518Chrysler · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518Ford · PowertrainIntake Manifold Runner Control Fault Stuck Open
- P1518GM · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518GMC · PowertrainThrottle Actuator Control (TAC) Module Serial Data Circuit
- P1518Lincoln · PowertrainIntake Manifold Runner Control Fault Stuck Open
- P1518Mercury · PowertrainIntake Manifold Runner Control Fault Stuck Open
- P1518Oldsmobile · PowertrainThrottle Actuator Control TAC Module Serial Data Circuit
- P1518Other · PowertrainIntake Manifold Runner Control (Stuck Open)
- P1518Saturn · PowertrainThrottle Actuator Control TAC Module Serial Data Circuit
- P1518Subaru · PowertrainStarter Switch Circuit Low Input
- P1518Volkswagen · PowertrainMain Relay Circuit Short To B+
- P1519Acura · PowertrainIAC Valve Circuit Failure
- P1519BMW · PowertrainA Camshaft Position Actuator Bank 1
- P1519Buick · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Cadillac · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Chevrolet · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Chrysler · PowertrainElectronic Throttle Module Low Volts Communication Disable
- P1519Ford · PowertrainIntake Manifold Runner Control Stuck Open
- P1519GM · PowertrainElectronic Throttle Module Low Volts Communication Disable