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.
- P1781Mercury · Powertrain4x4 Low Switch is Out of Self-Test Range
- P1781Nissan · PowertrainTransmission 4x4 Low Switch Out Of Range Fault
- P1781Other · Powertrain4X4 Switch Out of Self Test Range
- P1781Volkswagen · PowertrainEngine Torque Reduction Open Short To Ground
- P1782Ford · PowertrainP/ES Circuit Out Of Self Test Range
- P1782Lincoln · PowertrainP/ES Circuit Out Of Self Test Range
- P1782Mercury · PowertrainP/ES Circuit Out Of Self Test Range
- P1782Other · PowertrainP/ES Circuit Out Of Self Test Range
- P1782Volkswagen · PowertrainEngine Torque Reduction Short To B+
- P1783Ford · PowertrainTransmission Over-Temperature Condition
- P1783Lincoln · PowertrainTransmission Over-Temperature Condition
- P1783Mazda · PowertrainTransmission Fluid Temperature High Input
- P1783Mercury · PowertrainTransmission Over-Temperature Condition
- P1783Nissan · PowertrainTransmission Fluid Temperature High Input
- P1783Other · PowertrainTransmission Overtemperature Condition
- P1784Ford · PowertrainTransmission Mechanical Failure First And Reverse
- P1784Lincoln · PowertrainTransmission Mechanical Failure First And Reverse
- P1784Mercury · PowertrainTransmission Mechanical Failure First And Reverse
- P1784Other · PowertrainTransmission Mechanical Failure - First And Reverse
- P1784Volkswagen · PowertrainShift Up Down Wire Open Short To Ground
- P1785Ford · PowertrainTransmission Mechanical Failure First And Second
- P1785Lincoln · PowertrainTransmission Mechanical Failure First And Second
- P1785Mercury · PowertrainTransmission Mechanical Failure First And Second
- P1785Other · PowertrainTransmission Mechanical Failure - First And Second
- P1785Volkswagen · PowertrainShift Up Down Wire Short To B+
- P1786Ford · Powertrain3-2 Downshift Error
- P1786Lincoln · Powertrain3-2 Downshift Error
- P1786Mercury · Powertrain3-2 Downshift Error
- P1786Other · Powertrain3-2 Downshift Error
- P1786Volkswagen · PowertrainReversing Light Circuit Open