How serious is the code?
If the transmission does not have sufficient fluid pressure, not only can serious driving problems occur, but the transmission itself could suffer severe internal damage. Therefore, a P0867 diagnostic code is very serious.
Symptoms
Symptoms of a P0867 include:
- Transmission overheating
- Slipping
- Gear engagement failure
Causes
- Dirty transmission fluid
- Low transmission fluid level
- Transmission fluid leak
- Transmission pump failure
- Faulty transmission fluid pressure sensor
- Damaged wiring/connectors
- Overheated transmission
- Overheated engine
- Transmission fluid temperature sensor failure
How to diagnose the code?
One of the biggest causes of an OBDII P0867 fault code is dirty or low transmission fluid. Transmission fluid leaks can also cause this issue, as well as damaged wiring or connectors on the transmission wiring harness. If none of these issues are present, the transmission fluid pressure sensor and transmission fluid temperature sensor should be checked. If no problems are detected, the transmission pump or another internal transmission component could be to blame.
What repairs will fix P0867?
- Change transmission fluid and filter
- Repair transmission fluid leaks
- Repair or replace damaged wiring and sensors on the transmission wiring harness
- Replace transmission pump
- Replace transmission fluid pressure sensor
- Replace transmission fluid temperature sensor
- Replace or repair transmission