P0812
Reverse Input Circuit
Generic code
Transmission System
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0812?
See which problems come with P0812, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0812 means
- The fault code P0812 indicates an issue with the reverse input circuit. This fault code typically points to a problem with the electrical circuitry or connection associated with the reverse input, which is responsible for detecting when the vehicle is in the reverse gear.
Possible symptoms
- Malfunction Indicator Lamp (MIL) or Check Engine Light illuminated
- Inability to engage the reverse gear
- Delayed or erratic engagement of the reverse gear
- Potential limited vehicle drivability when reverse gear is required
Possible causes
- Faulty reverse input sensor or switch
- Wiring or connection problems in the reverse input circuit
- Loose or corroded connectors in the transmission system
- Faulty transmission control module (TCM)
- Electrical or wiring issues in the transmission system
Related parts
- Reverse Input Circuit:
Possible solutions
- Test and replace the faulty reverse input sensor or switch, if necessary
- Inspect and repair the reverse input circuit for any issues, such as damaged wires or connectors
- Ensure the connectors in the transmission system are secure and free from corrosion
- Test the transmission control module (TCM) for proper functionality and replace it if necessary
- Inspect and repair any electrical or wiring issues in the transmission system
Free on OBD DashX
P0812 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0812 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.