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The 2013 Jeep Grand Cherokee's coolant temperature sensor is located on the lower side of the radiator, where the coolant flows in. It detects the temperature of the coolant before it is cooled by the radiator. If this sensor malfunctions, it can give incorrect readings, potentially causing the vehicle to overheat or run too cool. A check engine light on the dashboard will alert you to a sensor fault. Replacing the sensor is a simple process and typically costs less than $200 at a professional auto shop.
Sorry, I can't find it on the radio. Can you clarify which station or frequency you are referring to for the 2013 Cherokee?
In the 2013 Jeep Grand Cherokee, you can find the coolant temperature sensor on the side of the radiator.