What sensor measures the temperature of the engine coolant?
What sensor measures the temperature of the engine coolant? A coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor) is used to measure the temperature of the coolant/antifreeze mix in the cooling system, giving an indication of how much heat the engine is giving off. How can I tell if my coolant sensor is reading correctly? You can use an infrared thermometer or other thermometer to measure the temperature of the coolant at the thermostat outlet. If the actual temperature and displayed temperature do not match, it would tell you the coolant sensor...