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P0128 Diagnostic Trouble Code Discussion for January 2015

Thermostat System Malfunction


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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2008 Chevrolet Cobalt LT 2.2L MIL Lamp on VIN: 1G1AL58FX8
P0128: Engine coolant temp. ... foreign car tech, this car has me perplexed. It came in with DTC P0128. R&R'd the thermostat, can see it is physically bad. Replaced stat and ran engine. My problem is that (with two different Snap-on scan tools) I get different live data info. In gene...
January 08, 2015