P278C Possible Causes
- Faulty kickdown switch
- Kickdown switch harness is open or shorted
- Poor electrical connection in the kickdown switch circuit
How to Fix Code P278C
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Engine light on (or service engine soon warning light)
P278C Meaning
The Transmission Control Module (TCM) monitors the kickdown switch circuit signal. The TCM sets the OBDII code when the kickdown switch circuit signal is outside factory specifications.