Circuit Description
The ECT sensor is a thermistor sensor that monitors engine coolant temperature. DTC is set when ECT sensor signal value is out or range during engine operation. Possible causes are:
- ECT sensor.
- Cooling system.
NOTE:
If DTCs P0115 and P0116 are output together, an open may exist in ECT sensor circuit. Perform DTC P0115 test before performing DTC P0116 test.