P0480 code meaning
Fan 1 Control Circuit
Powertrain system Generic code P04xx codes Check engine light
What P0480 means
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.
P0480 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0480
- Check engine light on
- Radiator fan does not run, or runs constantly
- Overheating at standstill or in traffic
- Air conditioning weak at standstill
Common causes of P0480
- Most likelyFan relay (coil open) or fan control module faulty
- Most 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
- Less likelyDriver in the engine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cooling fan 1Fan relayFan control moduleEngine control module
What each part of P0480 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 80 | The exact fault in that area. |
What to do next
- Note P0480 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0480
What does P0480 mean?
P0480 means "Fan 1 Control Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0480?
Drive gently and only to a workshop. With P0480 the car can go into limp mode (reduced power) to protect itself.
Will P0480 fail an emissions test?
Yes, it can. P0480 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0480 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0480 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.