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How To Change Coolant Temperature Sensor

If you’re like most drivers, you have a love-hate relationship with your car. You enjoy the sleek design and powerful engine, but you also dread the fact that it can be temperamental. One of the reasons for this erratic behavior is usually due to a faulty coolant temperature sensor. In this blog post, we will explore what a coolant temperature sensor is and how you can replace it yourself if it goes bad. We will also provide some helpful tips on how to diagnose and fix other common car problems.

What is a Coolant Temperature Sensor?

A coolant temperature sensor is a thermistor that measures the temperature of the coolant. This sensor is located in or near the engine block. When the engine reaches its operating temperature, the sensor sends a signal to the PCM (powertrain control module). This signal tells the PCM how hot or cold the engine is.

How Does a Coolant Temperature Sensor Work?

A coolant temperature sensor regulates the engine’s coolant temperature by sending a signal to the engine control unit (ECU) when the coolant is too hot or too cold. The ECU adjusts the engine’s RPM and fan speeds to maintain an optimal operating temperature. If your car has a computerized climate control system, the ECU may also activate airconditioning to keep the vehicle comfortable.

How to Change a Coolant Temperature Sensor

The coolant temperature sensor is a electronic device that is located in the engine block and transmits signals to the vehicle’s computer. The purpose of the sensor is to monitor and adjust the coolant’s temperature so that it remains within a safe range. When the coolant temperature becomes high, it can cause problems with the engine and could even lead to failure.

To change the coolant temperature sensor, you will need:
-A set of hex keys
-A coldbox or an external cooling system
-An old coolant temperature sensor
-New coolant temperature sensor
-Some lubricant


If you’re having trouble with your car overheating or dying suddenly, it might be time to change the coolant temperature sensor. This simple repair can save you a lot of money and hassle down the road, so don’t hesitate to get it done. In this article, we’ll walk you through the steps necessary to replace the sensor.