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.
- P1122Lincoln · PowertrainThrottle Position TP Sensor Circuit Intermittent Low Voltage
- P1122Mazda · PowertrainThrottle Position Stuck Closed
- P1122Mercury · PowertrainThrottle Position TP Sensor Circuit Intermittent Low Voltage
- P1122Oldsmobile · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Other · PowertrainThrottle Position (TP) Sensor Circuit Intermittent Low Voltage
- P1122Saturn · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Subaru · PowertrainPressure Sources Switching Valve Circuit High Input
- P1122Volkswagen · PowertrainOxygen Sensor Heater Circuit Bank 2 Sensor 2 Open
- P1123BMW · PowertrainPedal Position Sensor 1 High Input
- P1123Ford · PowertrainThrottle Position Sensor In Range But Higher Than Expected
- P1123Jaguar · PowertrainPedal Position Sensor A Circuit High Input
- P1123Kia · PowertrainLong Term Fuel Trim Adaptive Air System Low
- P1123Lincoln · PowertrainThrottle Position Sensor In Range But Higher Than Expected
- P1123Mazda · PowertrainThrottle Position Stuck Open
- P1123Mercury · PowertrainThrottle Position Sensor In Range But Higher Than Expected
- P1123Other · PowertrainThrottle Position Sensor In Range But Higher Than Expected
- P1123Volkswagen · PowertrainLong Term Fuel Trim Add Air Bank 1 System Too Rich
- P1124Ford · PowertrainThrottle Position Sensor Out of Self-Test Range
- P1124Kia · PowertrainLong Term Fuel Trim Adaptive Air System High
- P1124Lincoln · PowertrainThrottle Position Sensor Out of Self-Test Range
- P1124Mazda · PowertrainThrottle Position Sensor Signal Out Of Self Test Range
- P1124Mercury · PowertrainThrottle Position Sensor Out of Self-Test Range
- P1124Other · PowertrainThrottle Position Sensor Out Of Self Test Range
- P1124Subaru · PowertrainTCS Signal Circuit High Input
- P1124Volkswagen · PowertrainLong Term Fuel Trim Add Air Bank 1 System Too Lean
- P1125Buick · PowertrainAccelerator Pedal Position (APP) System
- P1125Cadillac · PowertrainAccelerator Pedal Position (APP) System
- P1125Chevrolet · PowertrainAccelerator Pedal Position (APP) System
- P1125Chrysler · PowertrainAccelerator Pedal Position (APP) System
- P1125Ford · PowertrainThrottle Position Sensor Intermittent