Error Code P0C29: Problems and Solutions

Meaning of Code P0C29

The error code P0C29 is related to the electronic transmission fluid auxiliary pump. This pump is used to keep the transmission engaged when the engine is stopped and the transmission is running.

The Transmission Control Module (TCM) monitors the control circuit of this pump. When the circuit signal is outside factory specifications, the TCM triggers the error code P0C29.

Possible Symptoms

• Engine light on (or “Service Engine Soon” warning light).

Possible Causes

• Faulty electronic transmission fluid auxiliary pump.
• Open or shorted auxiliary pump wiring harness.
• Poor electrical connection in the auxiliary pump circuit.

How to Fix Code P0C29?

1. Check the possible causes mentioned above.
2. Visually inspect the wiring harness and associated connectors.
3. Check for any damaged components.
4. Look for broken, bent, pushed out, or corroded connector pins.

If the problem persists after these checks, it may be necessary to consult a professional for further diagnosis.