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.
- P0779Generic · PowertrainPressure Control Solenoid B Intermittent
- P077AGeneric · PowertrainOutput Shaft Speed Sensor Circuit - Loss of Direction Signal
- P077BGeneric · PowertrainOutput Shaft Speed Sensor Circuit - Direction Error
- P077CGeneric · PowertrainOutput Shaft Speed Sensor Circuit Low
- P077DGeneric · PowertrainOutput Shaft Speed Sensor Circuit High
- P077EGeneric · PowertrainTransmission Fluid Temperature Measurement System - Multiple Sensor Correlation
- P077FGeneric · PowertrainReverse 2 Incorrect Ratio
- P0780Generic · PowertrainShift Error
- P0781Generic · Powertrain1-2 Shift
- P0782Generic · Powertrain2-3 Shift
- P0783Generic · Powertrain3-4 Shift
- P0784Generic · Powertrain4-5 Shift
- P0785Generic · PowertrainShift Timing Solenoid A
- P0786Generic · PowertrainShift Timing Solenoid A Range/Performance
- P0787Generic · PowertrainShift Timing Solenoid A Low
- P0788Generic · PowertrainShift Timing Solenoid A High
- P0789Generic · PowertrainShift Timing Solenoid A Intermittent
- P078AGeneric · PowertrainShift Timing Solenoid B
- P078BGeneric · PowertrainShift Timing Solenoid B Range/Performance
- P078CGeneric · PowertrainShift Timing Solenoid B Low
- P078DGeneric · PowertrainShift Timing Solenoid B High
- P078EGeneric · PowertrainShift Timing Solenoid B Intermittent
- P078FGeneric · PowertrainTransmission Mode Switch C Circuit
- P0790Generic · PowertrainNormal/Performance Switch Circuit
- P0791Generic · PowertrainIntermediate Shaft Speed Sensor A Circuit
- P0792Generic · PowertrainIntermediate Shaft Speed Sensor A Circuit Range/Performance
- P0793Generic · PowertrainIntermediate Shaft Speed Sensor A Circuit No Signal
- P0794Generic · PowertrainIntermediate Shaft Speed Sensor A Circuit Intermittent
- P0795Generic · PowertrainPressure Control Solenoid C
- P0796Generic · PowertrainPressure Control Solenoid C Performance/Stuck Off