OBD-II code · Powertrain (generic)
P0483 Cooling Fan Rationality Check
The ECM detects that the cooling fan response does not match command. Either the fan rotates without command, fails to rotate when commanded or its current draw is implausible.
Is it safe to drive with P0483?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFan motor seized or worn
- PossibleFan relay defective
- Less likelyWiring or connector fault
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, Cooling Fan Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.