OBD-II code · Powertrain (generic)
P0485 Cooling Fan Power/Ground Circuit
A fault is detected in the supply or ground path of the cooling fan circuit. Voltage drops or open ground prevent reliable fan operation.
Is it safe to drive with P0485?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyGround connection open or corroded
- PossiblePower supply circuit fault
- Less likelyConnector damaged
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Cooling Fan, Cooling Fan Relay
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.