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P0128 Diagnostic Trouble Code Discussion for October 2014

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2007 Chevrolet Malibu LT 2.2L MIL Lamp on, VIN: 1G1ZT58F37
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. I have an 07 Malibu that has a strange issue. car has a po128 code, temp gauge falls on its face, fan kicks on and ac becomes inop. look at data stream and have normal operation of cooling system 180 + -. have good heat but no gauge operation. we replaced clus...
October 13, 2014
2007 Chrysler Aspen Limited 5.7L MIL Lamp on, etc light on VIN: 1A8HW58227
P0128: Thermostat Rationality. ... owner also said electronic throttle control light on we replace t stat and car came back the next day found wire harnesss near condenser rubbing against a/c line causing short 2 wires were exposed when pushing wires against line etc light came on fixed wir...
October 16, 2014
2009 Dodge Charger R/T 5.7L MIL Lamp on VIN: 2B3LA53T39
P0128: Thermostat rationality. Vehicle came into shop with po128. Removed thermostat and rubber had become separated where the thermostat seats causing the code. Replaced with napa thermostat and code returned, then replaced with OE thermostat and code returned again. Freeze frame showing A...
October 21, 2014