OBD
P2CBC
Fan 3 Overspeed
What it means
P2CBC means Fan 3 Overspeed.
Check these first
- A fan 3 running faster than commanded
- A fan 3 speed signal reading high
- A fan 3 driver stuck at full output
- Air or debris letting fan 3 spin freely
What to do next
- Read fan 3 speed on a scan tool
- Compare fan 3 speed to the commanded value
- Check the fan 3 control and driver
- Inspect fan 3 for free spinning or debris
- Replace fan 3 if it runs away
- Clear the code and retest
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-10-10.