P2799 Code - Auxiliary Transmission Fluid Pump Control Circuit High
Quick Answer
The P2799 code indicates a problem with the auxiliary transmission fluid pump control circuit being too high. Common causes include Faulty auxiliary transmission fluid pump, Short or open circuits in the wiring, Corrosion or damage to electrical connectors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2799 indicates Auxiliary Transmission Fluid Pump Control Circuit High.
- Common causes
- Common causes include Faulty auxiliary transmission fluid pump, Short or open circuits in the wiring, Corrosion or damage to electrical connectors.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P2799 Description
The P2799 code indicates a problem with the auxiliary transmission fluid pump control circuit being too high. The auxiliary transmission fluid pump is responsible for maintaining the proper pressure and flow of transmission fluid in certain automatic transmission systems. When the control circuit for this pump is reading a high voltage, it means that there is an issue with the electrical signals being sent to the pump, potentially leading to a malfunction in the transmission system.
Common Causes of P2799
- Faulty auxiliary transmission fluid pump
- Short or open circuits in the wiring
- Corrosion or damage to electrical connectors
- Issues with the transmission control module
- Low transmission fluid levels or contaminated fluid
Symptoms of P2799
- Erratic shifting or difficulty shifting gears
- Transmission slippage
- Overheating of the transmission
- Illumination of the Check Engine light
- Harsh or delayed shifting
How to Fix P2799
- Diagnose the specific cause of the high voltage in the auxiliary transmission fluid pump control circuit using a scan tool.
- Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
- Test the auxiliary transmission fluid pump for proper function and replace if it is found to be faulty.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnosis may be required to pinpoint the root cause of the issue.
Cost to Fix P2799
The cost of repairing a P2799 code can vary depending on the cause of the issue and the extent of the repairs needed. In general, replacement of the auxiliary transmission fluid pump can cost anywhere from $200 to $500, while labor costs can range from $100 to $250. Wiring repairs or replacement may add to the overall cost. It is recommended to consult with a qualified mechanic for a more accurate estimate based on the specific circumstances of your vehicle.
Need more information about the P2799 code?
Need more information on how to fix the P2799 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2799 code diagnosed by a professional: Find a repair shop in your area
Code P2799 Information for Specific Makes
- P2799 Lexus — Auxiliary Transmission Fluid Pump Control Circuit High
- P2799 Toyota — Auxiliary Transmission Fluid Pump Control Circuit High
Frequently Asked Questions about P2799 Code
No Frequently Asked Questions about P2799 Code found.
Discuss the causes and fixes for P2799 OBDII Code
Code P2799 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.