Top 11 Car Sensors And Their Functions


In this modern age, a sensor is a term that you hear a lot. This technology is something that is becoming more and more popular. It has also been implemented in cars. There are different types of sensors in modern cars. So you may wonder about the car sensors and their functions.

Different types of sensors used in cars:

There are different types of sensors and each type is different. Different sensors serve different tasks. In this article, we are going to different types of sensors in cars. We will talk about their functionality. We will also talk about the importance of these sensors.

Every sensor is important. The computer is the real brain if you have a computerized engine control system. It uses the sensors to know what’s happening inside the car. So you know how important car sensors and their functions are.

If you do not know about the automobile sensors and their functions, we will help you out. We will talk about some of the most familiar car sensors and their functions. It will help you to know more about them. So let’s get down to the business. Here is the list of sensors-

1. Coolant Sensor

car sensors and their functionsIf you want to know about car sensors and their functions, then you have to know about the most important car sensors. When you talk about the important car sensors, Coolant Sensor is one of the most important ones.

The coolant sensor is probably the most important sensor. Because the computer relies on its input to control other functions. For example, activating or deactivating the Early Fuel Evaporation (EFE) system, spark advance and retard, EGR flow, canister purge, etc.

This sensor is generally located on the head or intake manifold. Because it is such an important sensor, it can be a problem if the sensor is faulty. If the sensor is faulty, there will be some symptoms like poor fuel mileage, stalling. So the point is that you have to make sure that the coolant sensor is not defective. If it is defective, then it will be a problem. Click Here for Coolant Sensors

2. The Mass air flow sensor:

car sensors and their functionsThe Mass air flow (MAF) sensor is one of the sensors that is used in an automobile engine. Without a shadow of a doubt, it is one of the most important sensors that you can find in an automobile. It is computer-controlled, and it can calculate the density of the air which has been taken in by the engine. Make sure that the sensor is working correctly. If the Mass air flow sensor stops working, then your car may stop running. Furthermore, the fuel usage will be higher. There are two types of MAF sensors. One of them is the vane meter, and the other one is the hot wire.

Also, you Can Learn More how to clean it by yourself.

3. The Engine Speed Sensor

car sensors and their functionsAnother sensor that is used in a car is the engine speed sensor. It is another important sensor. Make no mistake about it. The sensor is attached to the crankshaft. Its job is to monitor the crankshaft. To be more precise, its job is to monitor the crankshaft’s spinning speed.

4. Oxygen Sensor:

car sensors and their functionsThe oxygen sensor is another sensor of our car sensor list. It is a very familiar sensor. It is also known as the 02 sensors. It is situated in the exhaust pipe. The sensor determines how much oxygen is left in the exhaust. It will point out whether the fuel is burning rich or lean. It can be a nuisance if the sensor does not work well. You will have some real problems a hand if the oxygen sensor does not work and you should replace it and fix the new one. It’s always essential to have the best oxygen sensor installed in your car. A faulty oxygen sensor will cause high fuel consumption which is something you want to avoid. So it is necessary to know How Oxygen Sensor Works and Why It’s Important to Change If they fail.

5. Spark Knock Sensor

car sensors and their functionsThis sensor will make sure that the fuel is burning without a problem. The sensor will prevent detonation. We all know that detonation is something you want to prevent. Otherwise, it can cause real problems. The bottom line is- if you want the fuel to burn smoothly, then this is the sensor you must have.

6. Fuel Temperature Sensor

car sensors and their functionsIf the fuel is colder, then it will be denser. On the other hand, you can’t say the same thing about the warm fuel. The warm fuel is less dense. Now there is a difference between the warm fuel and the cold fuel. The warmer fuel burns faster and the colder fuel burns slower. The fuel temperature sensor makes sure the perfect fuel consumption of your car. If your car runs out of fuel, then many parts of your car may get damaged. So the sensor ensures the injection of the right amount of fuel. Thus, you can drive the vehicle smoothly. So it is also a sensor that you should know about.

7. Manifold Absolute Pressure (MAF) Sensor

car sensors and their functionsManifold Absolute Pressure Sensor is another that you will hear about.  It will sense the engine load. It has the ability to determine the distinction between the intake manifold pressure and outside. You should note that it is a sensor that is rarely used these days. It used to be popular in the early day.

8. Vehicle Speed Sensor

car sensors and their functionsJust by hearing the name, you can pretty much assume its functionality. But we will explain it anyway. The vehicle speed sensor has the ability to determine the speed of the wheels. It is a kind of tachometer.

9. Voltage sensor

car sensors and their functionsA voltage sensor is also very important. It manages the speed of your car. It makes sure that the speed is controllable. It is a good sensor to have in your car. So you should have it.

10. Throttle Position Sensor

car sensors and their functionsThe throttle position sensor is used with EFI (electronic fuel injection) and feedback carburetion. It notifies the computer about the rate of throttle opening. Furthermore, it tells the computer about the relative throttle position.

The throttle position sensor is mainly a variable resistor. It changes resistance when the throttle opens.

It is not difficult to know the symptoms of a faulty throttle position sensor. When there is a stumble during acceleration, you will know that your throttle position sensor is defective. It is the main symptom of a defective throttle position sensor. When you replace the sensor, do not misadjust it. Learn More

11. Camshaft Position Sensor

Finally, we will talk about the throttle position sensor. It is one of the many examples of sensors that is worth mentioning. Like any other sensor, it can also be useful for you. The control module uses the camshaft position sensor. It can indicate the position of the number one cylinder. In order to start the sequential fuel injection, the control module uses this piece of information as a reference point.

FAQ:  (Frequently Ask Question)

Question: How many sensors does a car have?

Answer: Different types of sensors are used in cars. In the modern age, the car is very smart and car makers introducing new sensors with new facilities. Approximately, 60 to 200 sensors are being used in a modern car. Sensors make the car operate very easily and identify the problems in a very short time.

Question: How much is a sensor for a car?

Answer: It’s Depends on Car’s Model and maker. In the market, you can find $20 to 300$ Sensors, such as O2 Sensors cost 20$ to 100$. Sometimes it could be high. If you want to know the details of Sensors price just click here.

Question: How do you fix a car sensor?


  • By using Scanner find out the faulty of sensors
  • Disconnect the Battery Negative post
  • Remove the Failed Sensors
  • Clean the Sensor’s Position
  • Install New Sensors
  • Re-Connect the All Electric Line
  • Test Drive the Car

We hope you can understand the how do fix a car Sensors if you want to know more about car fall code ODB II scanner just click here

Question: What happens when a vehicle speed sensor goes bad?

Answer: The vehicle speed sensor may cause a lot of problems if it goes bad. It can cause transmission revs higher. Sometimes, it may never go into the top gear.

Question: How long do car sensors last?

Answer: This depends on a lot of things like how are you taking care, you’re cleaning or not, check-up or not. However, normally a sensor last 50,000 to 60,000 miles. If your car is maintained properly, it may last a little longer.

Final Verdict:

In the end, these are some of the sensors in a car that you should know about. You need these sensors in cars for safety it is recommended that you buy quality sensors that are made by top automotive sensors manufacturers.

Car sensors are important in order to drive your car smoothly. It will let you know if there is any problem with your car. So it is important for you to know about car sensors and their functions. There is another point that you should remember. There are different types of sensors out there. But it will take a lot of money to buy all of these sensors. In addition, you do not even need all of these sensors. Some of the sensors that we have mentioned earlier may not be important for you. If you are an experienced car owner, then you should know about the sensors that suit you.

In addition, sometimes your cars check engine light may come on. It usually happens when there is something wrong with your car. You may ask yourself- Why is my Car Engine Check Light On?  There can be many reasons for that including defective sensors, not tightening the gas cap etc. If your car has faulty sensors, you can use scanners to detect it. There are a lot of products out there on the market. Panlong Bluetooth OBDII Scanner, OBD2 Scanner CAN OBDII Code Reader, ANCEL AD310 Classic Enhanced Scanner, KOBRA Wireless OBD-II Scanner, BAFX Bluetooth OBD-II Scanner, Autel Autolink AL319 OBD-II Scanner, OxGord OBD-II Scanner, BlueDriver Professional Bluetooth OBD-II Scanner. These will help you out.

Here are 2 ways to check engine light codes with OBD scanners

This article was all about car sensors and their functions. So hopefully, it helped you to know about the uses of sensors, types of vehicle sensors, and how sensors work in general. The bottom line is that it is important for a car owner to know about car sensors and their functions.

Automotive Sensors List ( WIKIPEDIA)

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