Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
ECT sensor is a thermistor sensor which monitors water temperature. DTC is set when ECM detects an open or short in ECT sensor circuit. See Fig 1. Possible causes are:
- ECT sensor circuit is open or shorted.
- Defective ECT sensor.
- Defective ECM.