The P2798 code is an OBD-II diagnostic trouble code that indicates a problem with the auxiliary transmission fluid pump control circuit. This code is typically associated with vehicles that use an auxiliary pump to pressurize the transmission fluid.
What Does the P2798 Code Mean?
The P2798 code means that the vehicle’s onboard diagnostic system has detected a low control circuit voltage for the auxiliary transmission fluid pump. This can prevent the pump from operating efficiently, leading to potential transmission issues.
What Causes the P2798 Code?
Several factors can trigger the P2798 code:
- Failure of the auxiliary transmission pump
- Issues with the drive motor generator power inverter control module
- Wiring issues that affect the control circuit
What Are the Symptoms of the P2798 Code?
Common symptoms associated with the P2798 code include:
- The vehicle may become immovable
- Erratic transmission behavior
- Transmission overheating
How Serious Is the P2798 Code?
The P2798 code has a moderate severity level. While it may not pose an immediate threat to vehicle safety or functionality, it is important to diagnose and address the issue promptly to prevent further complications and maintain optimal vehicle performance.
How to Diagnose the P2798 Code
To properly diagnose the P2798 code, a mechanic will typically perform the following steps:
- Use an OBD-II scanner to confirm the presence of the P2798 code.
- Inspect the wiring and connectors related to the auxiliary transmission pump for damage or corrosion.
- Test the auxiliary pump operation to ensure it is functioning as intended.
- Check the drive motor generator power inverter control module for proper operation.
Common Repairs for the P2798 Code
Depending on the diagnosis, common repairs for the P2798 code may include:
- Repairing or replacing damaged wiring or connectors
- Replacing the auxiliary transmission pump
- Repairing or replacing the drive motor generator power inverter control module
How Much Does It Cost to Fix the P2798 Code?
The cost to fix the P2798 code can vary widely based on the specific repairs needed, labor rates, and vehicle make and model. Generally, repair costs can range from $100 to $1,500. A thorough diagnosis will provide a clearer estimate.
Can I Fix the P2798 Code Myself?
If you have experience with automotive repairs and access to the necessary tools, you may be able to diagnose and fix the P2798 code yourself. However, due to the complexity of transmission systems, it is often best to consult with a professional mechanic to ensure proper repairs are made.
