Updated at: 13-03-2022 - By: micdot

Temperature sensors are installed in every car to keep an eye on the vehicle’s operating temperature. A potential problem is promptly brought to the attention of the system, and action is immediately taken. This sensor’s temperature readings must be accurate due to its significance. As a result, you might ask:

What is the location of my car’s temperature sensor? For many autos, there are two sensors. Near the cylinder head or block or on the thermostat housing is the external temperature sensor. In most cases, an additional sensor is located in the engine or cooling system. You may or may not stumble into this one.

External temperature sensors are often reliable sources of information. Many things, like the temperature of the route on which it travels, can affect its performance. Driving in hot weather can cause one’s body temperature to rise by a few degrees, making it more difficult to keep cool. Here, we’ll go into great detail on the temperature sensors in the automobile. So you’ll be able to find them and learn a little more about how they work. It will also offer you a better understanding of how your car’s temperature monitoring system works and how to accurately interpret the data it sends you. Let’s get started, shall we?

Where Is a Car’s External Thermometer?

Outside of the engine compartment, close to the cylinder head or block, you’ll find a temperature sensor. Near the thermostat case is another option. Under the hood or near the bottom of your vehicle is where you’ll discover it. You can rest assured that this thermometer is accurate and trustworthy because it plays an important function in your car’s system. Just because it’s an exterior temperature reading, it could be influenced by a variety of things, such as weather conditions.

The reading may be a few degrees off if you’re driving in sweltering conditions, for instance. However, there’s no need to be alarmed; the information provided is still trustworthy. This is still the best method because it makes you more attentive and alert while driving in bad weather.

How Many Temperature Sensors Are in a Car?

A automobile typically has two temperature sensors, as I described previously. The temperature of the surrounding air is measured by one of the two external sensors. The internal one is normally found near the radiator and is a little harder to find. There are two temperature sensors on other vehicles that work in tandem. In one example, the engine’s sensor transmits data to the control unit. When the first sensor sends information to the dashboard, it can use that information to send information to the second sensor.

The control system can identify engine overheating or an unusual rise in temperature thanks to these temperature sensors. According to the automobile company, it is typically located near or within the thermostat. Additionally, these sensors work on the principle of thermal potential difference dependency—the potential difference in car production varies when the engine temperature changes. Such a problem may be detected by the car’s control system, which monitors such things.

How Does Temperature Sensor Work in Car?

The temperature sensors in your automobile, as I explained before, work together to give you and your engine system useful information. So you’ll know about prospective concerns, and the engine will be able to fix minor faults right away. Here’s how your car’s temperature sensors operate:

The thermometer and the antifreeze or the cooling system emit heat, which is detected by the temperature sensors. The sensor will send the data to the onboard control system after it has detected the temperature. This information will be used by your car’s control system to determine whether or not it will continue to operate in the same manner or undergo some modifications. Sensor readings are used to determine how much work it should be doing. The control system may or may not activate the cooling fan based on the sensor’s data. It’s possible that the engine’s management system will make it run on a richer fuel mixture in some instances. Alternatively, the engine can be made to open the exhaust gas to increase the current airflow.

Temperature sensors, like all other auto parts, are susceptible to wear and tear over time.

What to do when the temperature sensor fails?

This could lead to overheating and other problems with your vehicle. Because of this, you may also be interested in learning how to identify it when it occurs. If you know the sensor’s location and look, you can perform a brief inspection to see if it has developed any fractures or splits.

Quick assessments can be helpful, but they won’t reveal every possible problem because sensor failures aren’t always evident. The Check Engine light will come on if your temperature sensor isn’t working properly and sends a message to the system. You should take your car to a professional immediately if the Check Engine light comes on.

When should you replace the temperature sensor?

The temperature sensor, like all other components, will degrade over time and eventually need to be replaced. As a result, after considering the following, you may want to consider changing your temperature sensor:

Engine damage

When the engine is stressed or damaged, it is common knowledge that sensor maintenance is in order. Because you don’t want to put yourself and your passengers in danger by driving a car with a broken one. As a result, if your cooling system has been damaged, it is recommended that you replace your temperature sensor.

Wear over time

Even normal wear and tear can cause the temperature sensor to fail after a given amount of time. In order to ensure accurate temperature readings, you’ll need to replace your temperature system after a few years. The temperature sensor in your car may always be replaced by a skilled mechanic. In the long run, it could save you a great deal of time and aggravation.


Simply said, your car has at least one or two temperature sensors. External temperature sensors can be found outside, in front, or even under the hood of most vehicles. The temperature sensor relays accurate temperature information to the engine system to prevent overheating, allowing it to perform particular tasks. As a result, it’s critical that your sensor is working properly at all times.

You’ll have to replace this part, too, from time to time if you want the greatest reading possible. It will also help you avoid other problems and save you money in the long run.