P0495
Fan 1 Overspeed
Fan 1 Overspeed: the control module has detected this fault condition.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Fan 1 relay welded closedCommon
- PWM line shorted to supplyPossible
Parts involved
- Cooling Fan 1
- Fan Relay 1
P0495 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.