Ford Focus Overheats and P0480 — Diagnose and fix
A faulty engine cooling fan module can cause a Ford Focus to overhead at idle, but cool fine at highway speeds. The faulty module can also set a P0480 trouble code.
Test for power and ground to the engine cooling fan module
1) Remove the cooling fan relay. With the key in the RUN position, check for battery power to terminal 1 in the relay socket (power to the relay control coil from fuse 32).
2)Next, check for battery power on terminal 3 in the socket from Mega 8 fuse
3)If you get good readings in the relay socket, reinstall the relay and check for those same voltages in the connector to the cooling fan module. Power on Pin 1 and ground on pin 2 in the connector.
If you have a bi-directional scan tool, command the cooling fans to come on. If you don’t have a scan tool, run the engine at idle until it begins overheating. If the fan doesn’t come on. Check for power and ground to the fan motor. If there’s no power/ground, the module is bad. If there is power and ground, the motor is bad.
©, 2022 Rick MuscoplatPosted on by Rick Muscoplat