Engine coolant temp sensor measures the actual temperature of the engine. This data is required by the ECM to adjust the fuel injection parameters and timing parameters for best engine performance. The measurement is also used to activate the radiator fan to avoid engine from overheating. This video tells some symptoms when ECT sensor goes bad.
What happens when car overheats?
What are the signs of bad coolant temperature sensor?
Where is coolant temperature sensor located?
Why do engine overheat?
Bad coolant sensor symptoms.
Signs of bad coolant temperature sensor.
How to check coolant temperature sensor?
How to replace coolant temperature sensor?
How to test coolant temperature sensor?
Will bad coolant temperature sensor cause engine overheating?
Will bad coolant temperature sensor cause engine starting problems?
Diagnose coolant sensor.
Bad coolant temperature sensor signs.