P0128 Diagnostic Trouble Code Discussion for February 2005
Thermostat System Malfunction
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| 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 |
