Description
OBD-II Trouble Code Description for P0128 Volkswagen
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
What does this mean?
OBD2 Code P0128 Volkswagen 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 Volkswagen code is to indicate a faulty thermostat. Similar codes: P0125 Volkswagen 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 Volkswagen
You will likely not notice any drivability problems other than the MIL illumination.
Causes
Possible causes of OBD code P0128 Volkswagen
A code P0128 Volkswagen 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 Volkswagen 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 Volkswagen code
The OBD2 Code Information Be Applicable For Volkswagen:
2013 Volkswagen e-Co-Motion Concept,2013 Volkswagen Up 4-door,2013 Volkswagen Up,2013 Volkswagen Touareg Edition X,2013 Volkswagen Scirocco GTS,2013 Volkswagen Santana,2013 Volkswagen Polo R WRC,2013 Volkswagen Polo BlueGT,2013 Volkswagen Passat Alltrack,2013 Volkswagen Lavida,2013 Volkswagen Kombi Last Edition,2013 Volkswagen Jetta Hybrid,2013 Volkswagen Golf Sportsvan Concept,2013 Volkswagen Golf Plus Life,2013 Volkswagen Golf Mk VII UK-Version,2013 Volkswagen Golf GTI Cabriolet,2013 Volkswagen Golf,2013 Volkswagen Gol 2-door,2013 Volkswagen Eco Up,2013 Volkswagen Caddy Cross,2012 Volkswagen Tiguan,2012 Volkswagen Jetta GLI,2012 Volkswagen Beetle,2011 Volkswagen eT Concept,2011 Volkswagen e-Up Concept,2011 Volkswagen XL1 Concept,2011 Volkswagen Touran,2011 Volkswagen Touareg,2011 Volkswagen Sharan,2011 Volkswagen Polo GTI,2011 Volkswagen Phaeton,2011 Volkswagen Jetta,2011 Volkswagen Eos,2011 Volkswagen CrossTouran,2011 Volkswagen CrossPolo,2011 Volkswagen CrossGolf,2011 Volkswagen Amarok,2010 Volkswagen Polo,2010 Volkswagen Golf,2009 Volkswagen Phaeton,2009 Volkswagen Golf,2009 Volkswagen Gol,2008 Volkswagen Phaeton,2008 Volkswagen Golf Variant,2008 Volkswagen Golf GTI Concept,2008 Volkswagen Golf BlueMotion,2007 Volkswagen Up Concept,2007 Volkswagen Touran,2007 Volkswagen Touareg,2007 Volkswagen Eos,2006 Volkswagen Rabbit,2006 Volkswagen Passat,2006 Volkswagen Jetta,2006 Volkswagen Eos,2006 Volkswagen CrossPolo,2005 Volkswagen Touareg,2005 Volkswagen Golf,2005 Volkswagen Fox,2004 Volkswagen RaceTouareg,2004 Volkswagen Golf,2004 Volkswagen Concept T,2004 Volkswagen Concept C,2003 Volkswagen Touran,2003 Volkswagen Passat
Note:
1. The list of automotive Makes at the right edge of the screen. The currently selected ODB-ii codes is for the Volkswagen makes.
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4. If your OBD-II trouble codes are for a different car, select that vehicle series before searching for the diagnostic codes because not all OBD2 codes used by one manufacture are used by the other makes.
5. The information contained on this site is presented for informational purposes only. We are not responsible for any actions you take on your vehicle. If you have any doubt as to repairs on your vehicle, please contact your technician.