What does an Engine Coolant Temperature Sensor Do?
The ECT or engine coolant temperature sensor is a vital sensor used by the ECM for proper engine operation. The coolant temperature sensor measures the engine's temperature and supplies this data to the engine control module. The temperature sensor reading of the coolant temperatures is used to regulate the following engine functions:
The engine needs a richer fuel mixture.
To control the exhaust gas re-circulation system.
To retard or advance engine timing.
Transmission shift points change.
Torque converter fails to lock up.
Warning Signs of a Bad or Malfunctioning Coolant Temperature Sensor!
Increased fuel consumption.
Increased levels of Black smoke.
Warning signs appear only after the engine has reached its normal operating temperature.
The Engine is hard to start after it reaches proper temperature.
The check engine light or service engine light appears.
Engine overheats frequently.
Engine Code P0116, P0117 or P0118 appear.
Any of the above fault/warning signs are an indicator that the coolant temperature sensor is faulted or needs replacement. A malfunctioning sensor can produce increased emissions and overheating problems. KLM Performance strongly recommends that this coolant sensor is addressed to ensure proper engine operation.