P0480Fan 1 Control Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The engine module switches the radiator fan either through a relay, whose coil it pulls to ground, or with a PWM signal to a fan control module. The circuit is an output that CARB requires to be checked continuously. P0480 concerns the control circuit of fan 1. GM sets it for an open circuit – 200 kΩ or more with the driver off, 50 of 63 samples, above 11 V, MIL after two trips – and reports a short to ground or positive as P0691/P0692; Saab models on GM technology set it after 5 s (relay) or 1 s (PWM). FCA bulletins also name it with the warning lamp. Ford's OBD summaries do not contain the code. If the fan stops, the engine can overheat in traffic and the air conditioning weakens at standstill.
- What you may notice
- Check engine light on
- Radiator fan does not run, or runs constantly
- Overheating at standstill or in traffic
- Air conditioning weak at standstill
- Likely causes
- LikelyFan relay (coil open) or fan control module faulty
- LikelyConnector at fan or relay corroded, water ingress or pin pushed out
- PossibleControl wire open or shorted to ground
- PossibleFan motor or fan assembly faulty
- RareDriver in the engine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.