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P0128 Diagnostic Trouble Code Discussion for February 2011

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2004 Chevrolet Trailblazer LS 4.2L Can not flash VIN: 1GNDS13S24
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. ... transmission shop to flash the PCM. They found the codes and a TSB about flashing to PCM for code P0606. We connected to A/C Delcos TIS site and found the update. As we were doing the update, it downloaded and was trying to install when our computer starte...
February 03, 2011
2006 Chrysler 300 Limited 3.5L MIL Lamp on VIN: ZC3KA63H26
P0128: Thermostat Rationality. ... advance. I have a chrysler 300 with the Hemi engine. a code appears intermintantly of p0128 witch says thermstat rationalzation. I cleared the code about 2 weeks ago & the customer called back today & said the MIL light had come back on. I scanned ...
February 18, 2011