Fault-Code Library · Cooling system
P0480: Cooling fan control circuit 1
The ECU cannot control or verify the primary electric cooling-fan circuit.
Common symptoms
- •Cooling fan inoperative
- •Fan running at full speed
- •Overheating in traffic
- •Air-conditioning performance loss
Likely causes
- •Failed fan assembly
- •Relay or fuse fault
- •Fan controller failure
- •Damaged wiring
First checks
- •Check fan fuse and power supply
- •Command the fan with diagnostics
- •Inspect wiring and fan-module communication
Important
Avoid traffic and heavy load until reliable fan operation is restored; overheating can damage the engine quickly.
A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.
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