Mechanical damages from heavy impact or vibration can lead to this sensor’s problems. It has electrical links to the power source, and any issue with the connections may bring some problems. If you drive in dusty environments, the mass air sensor will degrade at a fast rate.įaults at electrical connections may also cause the mass airflow sensor to malfunction. The driving environment is another determinant. In this case, smaller cars with smaller engines are prone to contamination due to short airways. The contamination may occur from 20000-25000 miles of service, though it depends on many factors.Īmong the factors is the car model. These agents contribute to its fast degradation. This sensor’s location on the engine’s air pathway makes it prone to agents like dust and other contaminants. The problems will mostly come due to its wear. There are telltale signs that will indicate that this sensor is malfunctioning, which we will look at later on in this article. Like other car parts, you may encounter problems with the mass airflow sensor. The computer interprets the info and determines the fuel amount needed for combustion. The air sensor takes note of the current changes and sends the information to the engine computer in the form of digital signals. In this case, the power source will provide more current to heat the wire. The more the air intake, the cooler the temperature will be near the wire. On pressing the gas, the throttle opens, allowing more air into the intake manifold. There is little airflow around the wire as such, it needs a low electric current to heat it. To understand its working principle, picture the vehicle running on idle. Proximal to this wire is a temperature sensor that measures air temperature near the wire. It is an electrically heated wire made of platinum and other materials of a similar conduction level. This sensor has a wire exposed to the air path. It relies on the principle of constant temperature. This type of sensor is prominent in most modern vehicles. Working Principle of the Hot Wire Mass Airflow Sensor Using the values, it will determine the amount of fuel that will go to the combustion chamber. The voltage signal goes to the engine control unit, which will determine the airflow rate. The slider movement causes a signal movement change, depending on the vane’s motion intensity. Incoming air will force the vane to rotate against the spring’s pressure.Īs the vane moves, the potentiometer’s slider pushes along the carbon track one end of the carbon track connects to the power supply unit. It uses a spring that holds a vane located in the air stream and connected to a potentiometer. Vane Mass Airflow Sensor Working Principleīack to the working principle, we will start with the vane mass airflow sensor. In this position, it is on the pathway of incoming air that goes to the combustion chamber. Where is the mass airflow sensor located? You will find this sensor located between the engine’s air filter and intake manifold in most vehicles. Each of them works in different ways to send signals to the car’s computer unit. There is the vane type and hot wire mass airflow sensor. Something that you should know is that there are two common types of mass airflow sensors. Mass Airflow Sensor Working PrincipleĪ look at the mass airflow sensor diagram will give you a slight hint of its working principle. If you have the same concern, you are in the right place as we look at its working principle and signs of a bad mass airflow sensor. Looking at the significance of this car sensor, it is not surprising that many people want to know how it works. It works effectively with an oxygen sensor for improved accuracy. The information helps the engine control unit to determine the fuel level supplied to the engine. Its primary role is to detect the air mass flow rate getting into the engine. The mass airflow sensor is a critical part of the internal combustion engine. They help regulate certain functions or detect problems with different systems. Car sensors are essential components in a vehicle.
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