P0128 Diagnostic Trouble Code Discussion for April 2011
Thermostat System Malfunction
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| Help Request | Posted | |
| 2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNDT13S23 P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. ... P1481 which was a fan speed loss of signal code. So I replaced the fan clutch and there is now a fan speed signal to the PCM. But now I have this P0128 code. It does have a new thermostat that is about 3 months old or so. Sitting in the shop running it was... |
April 05, 2011 |
