Description
OBD-II Trouble Code Description for P0128 Opel
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
What does this mean?
OBD2 Code P0128 Opel definition:
This means that the engine’s PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 Opel code is to indicate a faulty thermostat. Similar codes: P0125 Opel In determining the engine did not reach a “normal” temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.
Symptoms
Possible sumptoms of OBD code P0128 Opel
You will likely not notice any drivability problems other than the MIL illumination.
Causes
Possible causes of OBD code P0128 Opel
A code P0128 Opel may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor
Possible Solutions
Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 Opel OBD-II code: Verify coolant strength & level Verify proper cooling fan operation (check if it’s running more than it should). Replace if necessary. Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary. Verify proper intake air temperature (IAT) sensor operation, replace if necessary. If the above items check out good, replace the thermostat If Nissan vehicle, check for Technical Service Bulletins (TSBs), as the ECM may need to be reprogrammed to correct the P0128 Opel code
The OBD2 Code Information Be Applicable For Opel:
2013 Opel Astra OPC,2013 Opel Adam,2012 Opel Zafira Tourer,2012 Opel Combo,2012 Opel Astra GTC,2012 Opel Ampera,2011 Opel Zafira,2011 Opel Meriva,2011 Opel Corsa,2011 Opel Astra,2011 Opel Antara,2010 Opel Insignia,2010 Opel Corsa,2010 Opel Astra,2008 Opel Corsa,2007 Opel GT,2007 Opel Corsa,2007 Opel Astra,2007 Opel Antara,2006 Opel Vectra,2006 Opel Meriva,2006 Opel Astra,2005 Opel Astra,2004 Opel Astra,2003 Opel Signum,2003 Opel Meriva
Note:
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