What P0801 means
Reverse Inhibit Control Circuit Malfunction
How to diagnose
- Read freeze frame data. When P0801 set, your ECU snapshotted every sensor at that moment. This tells you what the car was doing when the fault triggered — RPM, load, coolant temp, throttle position, fuel trims. Almost always enough info to figure out the cause without further testing.
- Check for related codes. If you have P0801 plus other codes, fix the earliest one in the chain first — a single root cause often triggers multiple codes.
- Cheap fixes first. For most codes, the order is: inspect connectors + wiring (free), check for vacuum leaks (cheap), replace sensor (moderate), replace mechanical part (expensive). Follow that ladder before dropping money on parts.
Manufacturer-specific descriptions
Different manufacturers use P0801 for slightly different failure modes:
| BMW | Reverse Inhibit Control Circuit |
| FORD | Reverse Inhibit Control Circuit Malfunction |
| MITSUBISHI | Reverse Inhibit Control Circuit Malfunction |
| NISSAN | Reverse Inhibit Control Circuit Malfunction |
| VOLKSWAGEN | Reverse Inhibit Control Circuit Malfunction |
Read P0801 on your own car
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