OBD-II Generic Error Code P0879: How to Fix It

Q: Can I drive with error code P0879?

You may be able to drive short distances, but it's not recommended. The code indicates a circuit problem that can cause erratic shifting or transmission slippage, leading to costly damage.

Q: Where is the transmission fluid pressure sensor located?

It is typically mounted on the transmission valve body, accessible from underneath the vehicle. On some vehicles, it may be near the transmission pan.

Q: How much does it cost to fix P0879?

DIY cost is usually $20-$100 for the sensor and fluid. Professional repair ranges from $150 to $400 for diagnosis and replacement.

Q: What are common causes of P0879?

Low or dirty transmission fluid, damaged wiring or connectors, a faulty pressure sensor, or internal transmission problems.

Q: Will clearing the code permanently fix it?

No. Clearing the code only erases the stored trouble code. The root cause must be fixed; otherwise, the code will return.

Abstract

Error code P0879 means the transmission control module (TCM) has detected a malfunction in the 'E' pressure sensor circuit. This sensor monitors transmission fluid pressure to ensure proper shifting. Driving with this code can cause harsh shifts or transmission damage.