Circuit Description
WARNING: This page is about a different car, the 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
The ECT sensor is a thermistor that monitors coolant temperature. DTC is set when after engine has been running for predetermined amount of time, sensor value is out of specified range. Possible causes are:
- Faulty ECT sensor.
- Engine cooling system fault.