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.
- P1121Chevrolet · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121Chrysler · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121Ford · PowertrainThrottle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121GM · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121GMC · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121Honda · PowertrainThrottle Position Lower Than Expected
- P1121Infiniti · PowertrainThrottle Position Lower Than Expected
- P1121Jaguar · PowertrainPedal Position Sensor A Circuit Range Performance
- P1121Lexus · PowertrainAccelerator Pedal Position Sensor Range Performance Problem
- P1121Lincoln · PowertrainThrottle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121Mazda · PowertrainThrottle Position Sensor Signal Not Consistent With Mass Air Flow Signal
- P1121Mercury · PowertrainThrottle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121Oldsmobile · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121Other · PowertrainThrottle Position (TP) Sensor Circuit Intermittent High Voltage
- P1121Saturn · PowertrainTP Sensor Circuit Intermittent High Voltage
- P1121Subaru · PowertrainNeutral Position Switch Circuit Low Input AT Vehicles
- P1121Toyota · PowertrainAccelerator Pedal Position Sensor Range Performance Problem
- P1121Volkswagen · PowertrainOxygen Sensor Heater Circuit Bank 2 Sensor 2 Short To Ground
- P1122Acura · PowertrainThrottle Position Higher Than Expected
- P1122BMW · PowertrainPedal Position Sensor 1 Low Input
- P1122Buick · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Cadillac · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Chevrolet · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Chrysler · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Ford · PowertrainThrottle Position (TP) Sensor Circuit Intermittent Low Voltage
- P1122GM · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122GMC · PowertrainTP Sensor Circuit Intermittent Low Voltage
- P1122Honda · PowertrainThrottle Position Higher Than Expected
- P1122Infiniti · PowertrainThrottle Position Higher Than Expected
- P1122Jaguar · PowertrainPedal Position Sensor A Circuit Low Input