P2797 Fault Code

Auxiliary Transmission Fluid Pump Performance

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

The P2797 fault code indicates an issue with the auxiliary transmission fluid pump performance. This code is typically triggered when the transmission control module (TCM) detects that the auxiliary pump's performance is outside of expected parameters. The auxiliary pump is responsible for maintaining proper hydraulic pressure and ensuring that the transmission operates smoothly, particularly in social situations requiring additional power.

What are the symptoms of the P2797 code?

When experiencing a P2797 fault code, the following symptoms may be present:

• Slipping or rough shifting of the transmission.
• Poor acceleration and performance.
• Warning lights on the dashboard, particularly the check engine light.
• Unusual noises coming from the transmission area.
• Overheating of the transmission fluid.

What causes the P2797 code?

Several factors can contribute to the P2797 code being set, including:

• A malfunctioning auxiliary transmission fluid pump.
• Blockages in the fluid lines or filter.
• Low transmission fluid levels.
• Electrical issues such as damaged wiring or faulty connectors.
• Problems with the transmission control module itself.

How to fix P2797?

To resolve the P2797 fault code, it is recommended to:

• Inspect the auxiliary fluid pump and associated wiring for any visible damage or corrosion.
• Check the transmission fluid level and quality, and top up or replace as necessary.
• Flush the transmission system to remove potential blockages in the fluid lines.
• If the pump is faulty, replace it and ensure that all connections are secure.
• Finally, clear the fault codes and take the vehicle for a test drive to verify that the issue has been resolved.