The Engine Control Module (ECM/PCM/ECU), which controls your vehicle’s computer, detects an issue with its electric cooling fan. The PCM detects temperature changes via the coolant sensor. The PCM will activate the fan if the engine temperature reaches the specified value. This may differ depending on the model and make of the vehicle. The P0480 code is generated if the PCM does not receive a voltage signal appropriate from the cooling fans control circuit.
Ignoring the fault code could cause further damage to your engine. It is important to stop driving immediately if you see this code.
Table of Contents
What are the causes of the P0480 fault code?
- Faulty fan control relay 1
- Fan circuit problems, such as damaged cables and poor connections
- Faulty cooling fans 1
- Sensors that measure the intake air temperature (IAT), which are faulty, can cause a malfunction.
- Faulty A/C Selector Switch
- Faulty A/C Refrigerant Pressure Sensor
- Faulty Vehicle Speed Sensor (VSS).
What are the symptoms of fault code P0480?
- Engine fault light illuminating
- Engine overheating and temperature gauge increasing
How to Fix Error Code P0480?
Visually inspect the fan system. Check for damaged or worn out cables that may prevent the fan from working. If there’s an object blocking the airflow in front of your radiator, you can turn the fan using your finger. The fan may be faulty if it doesn’t turn. Check the electrical connection of the fan. Check for bent or corroded pins by disconnecting the connector. If necessary, repair the connector and apply dielectric grease to the terminals.
Check the cooling fan relay fuses in the fuse box. Check the fan relay as well as the wiring harness that connects the fuse box to the fan.
If these steps don’t resolve the problem, you should test the VSS and engine coolant temperatures sensors to make sure they are reading properly.
- Replace the fan control relay
- The fan cable harness can be repaired or replaced.
- Replace the cooling fan
- Solving electrical connection problems
- Replace the A/C Pressure Switch
- Replace the VSS sensor
- Replace the engine coolant temperature sensors that are faulty
P0480 Fault Code: Is it important?
The engine may overheat if the fault code P0480 is present. This can cause damage to engine components, cylinder head gaskets and other engine parts. The vehicle should not start if the fault code is P0480, and the fans do not work.
