P2CBC
Fan 3 Overspeed
Cooling fan 3 exceeds the calibrated maximum speed. Indicates load lost (broken fan blade) or supply voltage above nominal.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Fan blade broken or detachedCommon
- Alternator overvoltagePossible
Parts involved
- Cooling Fan 3
P2CBC is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.