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P0128 Diagnostic Trouble Code Discussion for September 2010

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2001 Oldsmobile Silhouette GL 3.4L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GHDX13E61
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. car dont start but after seat over 3 or 4 hours , or over night the car will start fine and run good then after couple secunds working will start to misfire, loop, backfire and making various other sounds finely not will not run anymore
September 01, 2010
2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1451Y
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. Happy Monday IATN members. I have a problem with this S-10 that wont reach operating temp. It gets to 153 then starts droping down to 140. I have replaced the thermostat twice. I even put a ECT sensor but that was no help. The thermostat was a stant 195F. T...
September 13, 2010