Circuit Description
The ECT sensor is a thermistor sensor that monitors engine coolant temperature. DTC is set when ECT sensor temperature is 68°F (20°C) or less for at least 20 minutes of engine operation. Possible causes are:
- Engine Coolant Temperature (ECT) sensor.
- Cooling system.
NOTE:
If DTCs P0115 and P0116 are output together, an open may exist in ECT sensor circuit. Perform DTC P0115 circuit test before performing DTC P0116 circuit test.