OBD
P2CBA
Fan 2 Overspeed
What it means
P2CBA means Fan 2 Overspeed.
Check these first
- A fan 2 running faster than commanded
- A fan 2 speed signal reading high
- A fan 2 driver stuck at full output
- Air or debris letting fan 2 spin freely
What to do next
- Read fan 2 speed on a scan tool
- Compare fan 2 speed to the commanded value
- Check the fan 2 control and driver
- Inspect fan 2 for free spinning or debris
- Replace fan 2 if it runs away
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.