October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Diagnostic Aids

DTC P0125 indicates lower than normal coolant temperature and probably does not indicate a faulty ECT sub-system. Low coolant temperature can be caused by a stuck open thermostat, cooling fan always on, very low ambient temperatures, corrosion in connector or skewed sensor. See appropriate SENSOR OPERATING RANGE CHARTS article.