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P0128 Diagnostic Trouble Code Discussion for February 2007

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2000 Volvo S40 1.9L MIL Lamp on VIN: YV1VS2557Y
P0128: coolant temp regulation. ... s40 has the mil lamp on for p0128 coolant temp regulation according to my launch x431, and my generic scanner. alldata doesnt even acknowledge that this code exists. so i can't find any test info for this code to even begin to try to figure out why it's th...
February 09, 2007