Does anybody have a comprehensive guide on how to replace the thermostat sensor and not the ECT sensor. I know the thermostat sensors aren't a common problem to happen but I got it plugged in and the probable cause was the ECT sensor, Thermostat sensor. I replaced the ECT sensor and got the garage to clear the fault, replaced the sensor two days ago and the EML has come back on. Is the thermostat likely to be the issue not the water pump impeller? Thank you for any help.