In some GM vehicles, a defective engine cooling water temperature (ECT) sensor can overheat or overheat a 2.0

liter I4LSY petrol engine with a turbocharger.According to GM, some vehicles in the 2019-2022 Buick, 

Cadillac, Chevrolet and GMC with 2.0-liter I4 LSY engines may display overheat, overheat

or overheat gauge lines. In this case, the dealer's service technician will perform an engine overheat diagnostic test 

as specified in the vehicle's service information.If the test cannot determine

the root cause of the overheating condition, the problem may be a malfunction

of the ECT sensor, which may be significantly lower than other ECT readings, and the location of the engine 

cooling water control valve (CCV). And can affect the area. The amount of coolant that goes into the radiator.