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Q:My 2003 Ford Focus ZTS is overheating and from what I have read, this is common with Focus'. I already changed the thermostat and check the fuses so next I want to check the coolant temp sensor and the coolant fan relay. Only problem is I am not sure the best way to get to the coolant temp sensor. Any advice as to the issue of the over heating or best way to get to the coolant temp sensor?
A:Hi Kay! If your Focus is actually overheating, and the gauge isn't moving out of the normal range the head temperature sensor could be bad. If you remove the thermostat and drive down the freeway and it still over heats, either the coolant pump isn't working, or the radiator is plugged because just the airflow on the highway should be enough to cool the car without the fan. This vehicle does not have a Coolant Temperature Sensor, it uses the Cylinder Head Temp to the job of the ECT. It's located behind the Alternator. However, this needs a mechanic's expertise to determine. I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem.