Powertrain fault codes
14821 Powertrain OBD-II fault codes: what each one means, 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.
- 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
- P1125GM · PowertrainAccelerator Pedal Position (APP) System
- P1125GMC · PowertrainAccelerator Pedal Position (APP) System
- P1125Lexus · PowertrainThrottle Control Motor Circuit Malfunction
- P1125Lincoln · PowertrainThrottle Position Sensor Intermittent
- P1125Mazda · PowertrainThrottle Position Sensor Signal Intermittent
- P1125Mercury · PowertrainThrottle Position Sensor Intermittent
- P1125Nissan · PowertrainTandem Throttle Position Sensor Circuit Fault
- P1125Oldsmobile · PowertrainAccelerator Pedal Position APP System
- P1125Other · PowertrainThrottle position sensor intermittent
- P1125Saturn · PowertrainAccelerator Pedal Position APP System
- P1125Toyota · PowertrainThrottle Control Motor Circuit
- P1125Volkswagen · PowertrainLong Term Fuel Trim Add Air Bank 2 System Too Rich
- P1126Lexus · PowertrainMagnetic Clutch Circuit Malfunction
- P1126Mazda · PowertrainThrottle Position Narrow Range Sensor Circuit
- P1126Nissan · PowertrainThermostat Function
- P1126Other · PowertrainThrottle Position (Narrow Range) Sensor Circuit Malfunction
- P1126Toyota · PowertrainMagnetic Clutch Circuit
- P1126Volkswagen · PowertrainLong Term Fuel Trim Add Air Bank 2 System Too Lean
- P1127Ford · PowertrainExhaust Not Warm Enough Downstream O2 Sensor Not Tested
- P1127Kia · PowertrainLong Term Fuel Trim Multiplicative Air System Low