If the temperature sensor is faulty, the control unit doesn’t interact with the radiator correctly. Some cars have a separate engine coolant temperature sensor for the radiator fan and the engine ...

A faulty Engine Coolant Temperature (ECT) sensor may lead the turbocharged 2.0L LSY gasoline engine in certain GM vehicles to run hot or even overheat.

A diagnostic test can tell if the temp sensor is working or not, but obviously cannot tell if it is giving the correct temperature readings. How could know that without an entirely separate coolant ...

If not, it could be a coolant temperature sensor or circuit issue that will require the proper scan tool and technician to diagnose correctly. How To Reach Alex ...