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Eric, Automotive Repair Shop Manager
Category: Ford
Satisfied Customers: 32374
Experience:  Automotive Repair Shop Manager, Technician
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P0128 code, service engine soon, light is on

Customer Question

P0128 code, service engine soon, light is on
Submitted: 6 years ago.
Category: Ford
Expert:  Eric replied 6 years ago.

ok, this is for coolant temperature sensor. First, check that coolant level is ok. If it is, then it is either a faulty thermostat or faulty engine coolant temperature(ECT) sensor.

Pull thermostat and put in a pot of boiling water and see if thermostat opens as designed. If it doesnt, replace thermostat. If it does, then replace the ECT sensor.

Here are their locations:
Eric and 2 other Ford Specialists are ready to help you
Expert:  Eric replied 6 years ago.

just noticed that the ect sensor wasnt id'd. here you go on that: