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P0128 Diagnostic Trouble Code Discussion for August 2007

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Volvo S40 1.9L MIL Lamp on VIN: YV1V527503
P0128: coolant temp below thermostat regilating temp. ... for taking the time to read my post. Customer states check engine light comes on and off. No current codes, but found freeze frame. I am using a Modis in generic mode. Freeze frame shows P0128 Coolant thermostat below regulating temperature. Freeze frame c...
August 17, 2007