Join Now
International Automotive Technicians Network

P0128 Diagnostic Trouble Code Discussion for March 2011

Thermostat System Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2002 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR12192
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. Hello all, thanks in advance for the advice. Car came in missing out on cyclinder #5 at idle. Once you give it some gas the miss goes away. I have swapped coils, wires, plugs, injectors and the miss always stays with #5. I am thinking maybe an internal vacuum ...
March 08, 2011
2006 Mercedes-Benz B200 Turbo 2.0L No power VIN: WDDFH34XX6
P0128: coolant below thermostat required temperature. Customer is saying he is loosing power intermittantly. Seems to drive fine for us and we have never duplicated symptoms. When turbo was orginally replaced, car had not power whats so ever. Car seems to drive fine but would not call it a rocket, but have never...
March 22, 2011
2003 Mercedes-Benz E320 3.2L Hesitation, MIL Lamp on VIN: WDBUF65J53
P0128: Thermostat. and also set p02006 (right front o2) Customer complaint is engine light on with intermittant hesitation (very slight) We are replacing thermostat, but not sure why all 4 oxygen sensors are showing faulty. Scanner shows o2's switching fine and car is running ...
March 24, 2011
2002 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR12192
P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. Hello all, thanks in advance for the advice. Car came in missing out on cyclinder #5 at idle. Once you give it some gas the miss goes away. I have swapped coils, wires, plugs, injectors and the miss always stays with #5. I am thinking maybe an internal vacuum ...
March 08, 2011
2006 Mercedes-Benz B200 Turbo 2.0L No power VIN: WDDFH34XX6
P0128: coolant below thermostat required temperature. Customer is saying he is loosing power intermittantly. Seems to drive fine for us and we have never duplicated symptoms. When turbo was orginally replaced, car had not power whats so ever. Car seems to drive fine but would not call it a rocket, but have never...
March 22, 2011
2003 Mercedes-Benz E320 3.2L Hesitation, MIL Lamp on VIN: WDBUF65J53
P0128: Thermostat. and also set p02006 (right front o2) Customer complaint is engine light on with intermittant hesitation (very slight) We are replacing thermostat, but not sure why all 4 oxygen sensors are showing faulty. Scanner shows o2's switching fine and car is running ...
March 24, 2011