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P0128 Diagnostic Trouble Code Discussion for March 2006

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Ford Focus ZX3 2.0L MIL Lamp on VIN: 3FAHP31383
P0128: coolant temp below thermostat regulating temp. this vehicle came in with a code po 128 (coolant temp below thermostat regulating temp) customer also had a vague complaint that the car was a little sluggish since the light came on. all sensors involved such as the coolant temp sensors and the intake air tem...
March 22, 2006