Coolant Temperature Sensor

The coolant sensor is located in the cylinder head on 3.7L engines. On the Federal 5.2L 2-barrel engine, the sensor is located in the charge temperature location on the intake manifold. On all other 5.2L engines the sensor is located in the intake manifold. The coolant sensor informs the SCC when the engine has reached normal operating temperature, so that proper adjustment can be made to the air/fuel ratio. It also prevents changes until normal operating temperature is reached. The coolant sensor also controls the amount of ignition timing advance or retard when the engine is cold.