This is a generic powertrain diagnostic trouble code (DTC), which means it covers all makes/models, 1996-newer. However, specific troubleshooting steps will vary depending your vehicle. pulling the code P0480 displayed, if refers to the engine cooling fan circuit. It is a generic code applying to all OBD II (on board diagnostics) vehicles. The PCM (powertrain control module) senses the increase in engine temperature through the CTS (coolant temperature sensor) located near the thermostat. When the temperature reaches about 223-degrees F (value depends on make/model/engine), the PCM will command the cooling fan relay to turn on the fan. It does so by supplying the ground to the relay.
There is a problem within this circuit causing the fan to fail to operate allowing the engine to overheat while sitting still or driving at a slow speed. When the PCM attempts to activate the fan and senses the command and the result do not match, the code is set. Symptoms may include:
- Check engine light (malfunction indicator lamp) illumination and code P0480 set
- Engine temperature will rise when the vehicle stops and idles
The causes for this DTC may include:
- Faulty fan control relay 1
- Fan control relay harness is open or shorted
- Circuit electrical connections poor
- Faulty cooling fan 1
- Faulty coolant temperature sensor
- Fan cooling fan harness is open or shorted
- Cooling fan circuit poor electrical connection. hope this helps you.