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.
- P1831Buick · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831Cadillac · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831Chevrolet · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831GM · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831GMC · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831Oldsmobile · PowertrainPC Solenoid Power Circuit Low Voltage
- P1831Other · PowertrainTransmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Ground
- P1831Saturn · PowertrainPC Solenoid Power Circuit Low Voltage
- P1832Ford · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Circuit Failure
- P1832Lincoln · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Circuit Failure
- P1832Mercury · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Circuit Failure
- P1832Other · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Circuit Failure
- P1833Buick · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833Cadillac · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833Chevrolet · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833GM · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833GMC · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833Oldsmobile · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1833Other · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Open Circuit
- P1833Saturn · PowertrainA/T Solenoids Power Circuit Low Voltage
- P1834Ford · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Battery
- P1834Lincoln · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Battery
- P1834Mercury · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Battery
- P1834Other · PowertrainTransmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Battery
- P1834Volkswagen · PowertrainPressure Control Solenoid 5 Open Short To Ground
- P1835Buick · PowertrainKick-Down Switch
- P1835Cadillac · PowertrainKick-Down Switch
- P1835Chevrolet · PowertrainKick-Down Switch
- P1835GM · PowertrainKick-Down Switch
- P1835GMC · PowertrainKick-Down Switch