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P0128 Diagnostic Trouble Code Discussion for February 2012

Thermostat System Malfunction


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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Cadillac CTS 3.2L Misfire VIN: 1G6DM57N93
P0128: ECT Sensor Below Thermostat Regulating Temperature. Cylinder 1 misfire most of the time, plug darker than the rest. The valve cover gasket has been leaking and filled #1 hole and swelled plug boot. Suspected voltage jumping. Tested compression 175 PSI, 3 and 5 cylinder same compression and no misfire on those c...
February 08, 2012
2003 Cadillac CTS 3.2L Misfire VIN: 1G6DM57N93
P0128: ECT Sensor Below Thermostat Regulating Temperature. Cylinder 1 misfire most of the time, plug darker than the rest. The valve cover gasket has been leaking and filled #1 hole and swelled plug boot. Suspected voltage jumping. Tested compression 175 PSI, 3 and 5 cylinder same compression and no misfire on those c...
February 10, 2012
2007 BMW 335i 3.0L MIL Lamp on VIN: WBAWB73537
P0128: coolant thermostat. car came in with code p0174 lean bank 2. I smoke tested the intake no leaks. the car is not equipped with a mass air sensor. alldata stinks when it comes to info on bmws. Any help appreciatted.
February 13, 2012
2006 Chevrolet Colorado LT 3.5L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: 1GCDS13626
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. This vehicle drives normally for about 30 seconds and then starts to bog down severely. MAF readings seem like they should be higher. If you "get on it", the MIL lamp will flash, however STFT doesn't move from 0.00. and the dash readout says "Reduc...
February 16, 2012
2001 BMW 325i 2.5L MIL Lamp on VIN: WBAAV33461
P0128: coolant thermo below reg temp. I do not have a beamer scanner, read the knowledge base for the code it came in with and gave it a try, on the freeway, even after replacing the thermo code comes back after a few miles. sublet to reflash no change. radiator new, cap new, thermo assembly new.]...
February 17, 2012
2001 BMW 325i 2.5L MIL Lamp on VIN: WBAAV33461
P0128: coolant thermo below reg temp. I do not have a beamer scanner, read the knowledge base for the code it came in with and gave it a try, on the freeway, even after replacing the thermo code comes back after a few miles. sublet to reflash no change. radiator new, cap new, thermo assembly new.]...
February 18, 2012
2003 Cadillac CTS 3.2L Misfire VIN: 1G6DM57N93
P0128: ECT Sensor Below Thermostat Regulating Temperature. Cylinder 1 misfire most of the time, plug darker than the rest. The valve cover gasket has been leaking and filled #1 hole and swelled plug boot. Suspected voltage jumping. Tested compression 175 PSI, 3 and 5 cylinder same compression and no misfire on those c...
February 08, 2012
2003 Cadillac CTS 3.2L Misfire VIN: 1G6DM57N93
P0128: ECT Sensor Below Thermostat Regulating Temperature. Cylinder 1 misfire most of the time, plug darker than the rest. The valve cover gasket has been leaking and filled #1 hole and swelled plug boot. Suspected voltage jumping. Tested compression 175 PSI, 3 and 5 cylinder same compression and no misfire on those c...
February 10, 2012
2007 BMW 335i 3.0L MIL Lamp on VIN: WBAWB73537
P0128: coolant thermostat. car came in with code p0174 lean bank 2. I smoke tested the intake no leaks. the car is not equipped with a mass air sensor. alldata stinks when it comes to info on bmws. Any help appreciatted.
February 13, 2012
2006 Chevrolet Colorado LT 3.5L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: 1GCDS13626
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. This vehicle drives normally for about 30 seconds and then starts to bog down severely. MAF readings seem like they should be higher. If you "get on it", the MIL lamp will flash, however STFT doesn't move from 0.00. and the dash readout says "Reduc...
February 16, 2012
2001 BMW 325i 2.5L MIL Lamp on VIN: WBAAV33461
P0128: coolant thermo below reg temp. I do not have a beamer scanner, read the knowledge base for the code it came in with and gave it a try, on the freeway, even after replacing the thermo code comes back after a few miles. sublet to reflash no change. radiator new, cap new, thermo assembly new.]...
February 17, 2012
2001 BMW 325i 2.5L MIL Lamp on VIN: WBAAV33461
P0128: coolant thermo below reg temp. I do not have a beamer scanner, read the knowledge base for the code it came in with and gave it a try, on the freeway, even after replacing the thermo code comes back after a few miles. sublet to reflash no change. radiator new, cap new, thermo assembly new.]...
February 18, 2012