Description
OBD-II Trouble Code Description for P0128 Honda
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
What does this mean?
OBD2 Code P0128 Honda 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 Honda code is to indicate a faulty thermostat. Similar codes: P0125 Honda 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 Honda
You will likely not notice any drivability problems other than the MIL illumination.
Causes
Possible causes of OBD code P0128 Honda
A code P0128 Honda 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 Honda 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 Honda code
The OBD2 Code Information Be Applicable For Honda:
2013 Honda Urban SUV Concept,2013 Honda S660 Concept new,2013 Honda NSX-GT Concept,2013 Honda N-One,2013 Honda GEAR Concept,2013 Honda Civic,2013 Honda CR-Z,2012 Honda Civic,2011 Honda Jazz,2011 Honda Accord,2010 Honda Insight,2010 Honda CR-V,2009 Honda City,2008 Honda S2000,2008 Honda Accord,2007 Honda Fit,2007 Honda Civic,2007 Honda CR-V,2007 Honda Accord,2006 Honda Civic,2005 Honda Element,2005 Honda CRV SE,2005 Honda CRV EX,2003 Honda Element,2003 Honda CR-V,2002 Honda NSX,2002 Honda Civic Si,2002 Honda Accord SE,2001 Honda NSXR Concept,2001 Honda Model X Concept,2001 Honda Civic Si Concept,2001 Honda Civic Concept,2001 Honda CR-V,2001 Honda Accord Sedan,2001 Honda Accord Coupe,2000 Honda S2000,2000 Honda Passport,2000 Honda Insight
Note:
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