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Home >> Jaguar >> 2004 >> XJ8 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electronic Engine Controls - 4.2L (2003.5-09) >> Description and Operation >> Electronic Engine Controls >> Engine Coolant Temperature (ECT) Sensor
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Engine Coolant Temperature (ECT) Sensor

The engine coolant temperature (ECT) sensor is a thermistor type sensor that provides an input signal to the ECM which is proportional to the engine coolant temperature. The ECT sensor is a negative temperature coefficient (NTC) sensor and its resistance decreases with a proportional increase in engine coolant temperature.