Car Coolant Level Sensors

The coolant level sensor is located in the coolant recovery tank, and is an electronic sensor that notifies the driver in the case that the coolant level drops below the minimum level. If the light on the dash comes on notifying you that the coolant level is low, and the coolant is actually topped off, you have a failed coolant level sensor.

The coolant level sensor usually has a wire connector on the top of the unit and a plastic gland nut that retains the sensor. Do not remove the sensor while the engine is hot as the coolant is under pressure and you will get severe burns.
.