OBD-II Code · Powertrain
P0483
Cooling Fan Rationality Check
medium severitySafe to drive$200-$700
Fan speed feedback does not match commanded speed.
Common symptoms
- CEL
- Erratic fan behavior
Likely causes
- Failed fan motor
- Wiring
- PCM fault
Where to start
- Try the cheapest cause first. Start by checking: failed fan motor.
- Cost & scope. $200-$700
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
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