P2796 Fault Code

Auxiliary Transmission Fluid Pump Control Circuit/Open

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2796 fault code indicates an issue with the auxiliary transmission fluid pump control circuit or an open circuit. This can affect the operation of the transmission and overall vehicle performance. Proper fluid pressure in the transmission is crucial for its functioning, and this fault suggests that the control circuit for the auxiliary pump is not operating as intended.

• The auxiliary transmission fluid pump helps maintain appropriate fluid levels and pressure in automatic transmissions, especially in situations where the main pump may not be sufficient.
• If there's an open circuit, it can lead to inadequate fluid circulation, which may result in transmission overheating or shifting problems.

What are the symptoms of the P2796 code?

Symptoms of a P2796 fault code may include:

• Transmission shifting problems or delays.
• Overheating transmission due to low fluid pressure.
• Warning lights on the dashboard, such as the transmission or check engine light.
• Unusual noises coming from the transmission area during operation.

What causes the P2796 code?

Common causes of the P2796 code include:

• A faulty auxiliary transmission fluid pump.
• Issues with wiring or connectors in the control circuit.
• Open circuit due to damaged harness or connectors.
• Failed transmission control module (TCM).
• Low transmission fluid level or dirty fluid could also contribute to issues in the pump operation.

How to fix P2796?

To resolve the P2796 fault code, the following steps are recommended:

• Inspect the auxiliary transmission fluid pump wiring and connectors for any signs of damage or corrosion.
• Check the auxiliary pump functionality to ensure it operates properly.
• Ensure that the transmission fluid level is adequate and that the fluid is clean.
• If wiring and the pump are fine, consider scanning the vehicle's transmission control module for additional fault codes that could provide more insight into the issue.
• If necessary, replace any defective components, repair wiring issues, and clear the fault codes to see if the issue reoccurs.