A mass airflow sensor (MAS) is a device used in modern internal combustion engines to measure the mass flow rate of air entering the engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct amount of fuel to the engine.
There are two main types of MAS sensors in use, hot-wire and hot-film.
How do i know if my mass airflow sensor is not working?
A mass airflow sensor measures the air flow through a engine. If the sensor is not working, the engine may not be able to achieve the correct air flow needed for proper engine performance.
How do you check a mass air flow sensor on a BMW?
The BMW mass air flow sensor is located on the air intake manifold and is used to control the air flow into the engine. A “check engine” light may come on if the air flow sensor is not functioning properly.
To test the air flow sensor, you will need to remove the cover of the intake manifold. Then, use a vacuum cleaner to remove the dust and debris that may be blocking the sensor.
To replace the air flow sensor, you will need to remove the intake manifold and replace the sensor.
How do you test the mass airflow sensor?
The mass airflow sensor measures the amount of air being drawn into and expelled from the engine. The sensor is usually located in the intake manifold.
When the air flow into the engine decreases, the sensor sends a signal to the engine controller, which then reduces the engine’s fuel supply. When the air flow into the engine increases, the sensor sends a signal to the engine controller, which then increases the engine’s fuel supply.
Can you test a mass air flow sensor by unplugging it?
Yes, you can unplug a mass air flow sensor to test it.
Conclusion
To check the mass airflow sensor on a BMW, first locate the sensor on the engine. Then, use a multimeter to test the sensor for continuity.
If there is no continuity, the sensor needs to be replaced.
