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.
- P1107Volkswagen · PowertrainOxygen Sensor Heating Circuit Bank 2 Sensor 1 Short To B+
- P1108Acura · PowertrainBARO Circuit High Input
- P1108Buick · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Cadillac · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Chevrolet · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Chrysler · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Ford · PowertrainDual Alternator Battery Lamp Circuit Malfunction
- P1108GM · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108GMC · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Honda · PowertrainBARO Circuit High Input
- P1108Infiniti · PowertrainBARO Circuit High Input
- P1108Lincoln · PowertrainDual Alternator Battery Lamp Circuit Malfunction
- P1108Mercury · PowertrainDual Alternator Battery Lamp Circuit Malfunction
- P1108Oldsmobile · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Other · PowertrainDual Alternator Battery Lamp Circuit Malfunction
- P1108Saturn · PowertrainBARO To MAP Sensor Circuit Comparison Too High
- P1108Volkswagen · PowertrainOxygen Sensor Heating Circuit Bank 2 Sensor 1 Output Too Low
- P1109Buick · PowertrainSecondary Port Throttle System
- P1109Cadillac · PowertrainSecondary Port Throttle System
- P1109Chevrolet · PowertrainSecondary Port Throttle System
- P1109Chrysler · PowertrainSecondary Port Throttle System
- P1109Ford · PowertrainIAT - B Sensor Intermittent
- P1109GM · PowertrainSecondary Port Throttle System
- P1109GMC · PowertrainSecondary Port Throttle System
- P1109Lincoln · PowertrainIAT B Sensor Intermittent
- P1109Mercury · PowertrainIAT B Sensor Intermittent
- P1109Oldsmobile · PowertrainSecondary Port Throttle System
- P1109Other · PowertrainIAT - B Sensor Intermittent
- P1109Saturn · PowertrainSecondary Port Throttle System
- P1109Volkswagen · PowertrainOxygen Sensor Circuit Bank 2 Sensor 2 Voltage Too Low/Air Leak