P0C31 Possible Causes
- Defective inverter cooling system “B”
- Inverter cooling system “B” harness is open or short-circuited
- Poor electrical connection in the inverter cooling system “B” circuit
What Does It Mean?
How to Fix Code P0C31
Check the “possible causes” listed above. Visually inspect the related cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0C31 Possible Symptoms
Engine light on (or service engine soon warning light)
P0C31 Meaning
The engine control module (ECM) monitors the inverter cooling system “B”. The ECM sets the OBDII code when the inverter cooling system “B” does not meet factory specifications.