How serious is the code?
The P0868 diagnostic code is extremely serious, as you may not only experience driving problems. You can also seriously damage the internal parts of the transmission if there is not enough fluid pressure to operate them.
Symptoms
Symptoms of a P0868 include:
- Transmission overheating
- Smoke coming from the transmission
- Slipping in and out of gear
- Transmission not shifting into gear
Causes
- Dirty or low transmission fluid
- Transmission fluid leak
- Damaged wiring and/or connectors
- Overheated transmission
- Overheated engine
- Faulty transmission pump
- Faulty transmission fluid pressure sensor
- Faulty transmission fluid temperature sensor
How to diagnose the code?
The level and condition of the transmission fluid should be one of the first things checked when attempting to diagnose a P0868 OBDII trouble code. Dirty fluid should be changed immediately, any leaks must be repaired. The wiring and connectors as well as the transmission wiring harness should also be inspected for signs of damage and corrosion. Next, the transmission fluid pressure sensor and the transmission fluid temperature sensor will need to be tested. If none of these issues are a factor, further diagnosis will be necessary to determine if the problem is coming from the transmission pump or another internal component.
What repairs will fix P0868?
- 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