P2798 Possible Causes
- Defective auxiliary transmission fluid pump
- Auxiliary transmission fluid pump wiring harness is open or short-circuited
- Poor electrical connection in the auxiliary transmission fluid pump circuit
How to Fix Code P2798
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Check engine light on (or service engine soon warning light)
P2798 Meaning
The Transmission Control Module (TCM) monitors the auxiliary transmission fluid pump control circuit. The TCM sets the OBDII code when the signal from the auxiliary transmission fluid pump control circuit falls outside factory specifications.