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P0128 Diagnostic Trouble Code Discussion for February 2005

Thermostat System Malfunction


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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Chevrolet Silverado 1500 4.3L Excessive Emissions, MIL Lamp on VIN: 2GCEC19X63
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. ... bodyshop has had a ses light on & code P0128. The body shop replaced coolant temp sensor but no change. My snap-on scanner shows ect -40 degrees, intake air temp -40 and baro -.55 volts all the time. Tested for 5 volts from signal circut at ect harness...
February 22, 2005
2003 Chevrolet Silverado 1500 4.3L Excessive Emissions, MIL Lamp on VIN: 2GCEC19X63
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. ... bodyshop has had a ses light on & code P0128. The body shop replaced coolant temp sensor but no change. My snap-on scanner shows ect -40 degrees, intake air temp -40 and baro -.55 volts all the time. Tested for 5 volts from signal circut at ect harness...
February 22, 2005