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.

DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem: Condition

DTC is set when ECT sensor temperature is 86°F (30°C) or less for at least 20 minutes of engine operation. Possible causes are:

Engine Coolant Temperature (ECT) sensor.
Cooling system.