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The air flow sensor is also called the mass air flow sensor where its function is to help determine the mass flow-rate that enters into the combustion engine. The flow rate is essential because it helps the engine control unit to deliver and give the exact fuel mass going to the engine.


The air flow sensor comes in two types which are hot wire and vane meter. The vane meter or the vane air flow sensor is used to measure the flow of air to the engine with a loaded air flap. It also has a screw for fuel adjustment where it opens and closes on the side. The vane air flow sensor also moves through the drag force which flows against the vane. Although this is a good kind of air flow sensor, it has various disadvantages like restricting the airflow which can then limit the output of the engine.


The second type of air flow sensor is the hot wire mass where it helps in determining the air that flows into the intake system of the engine. Some car manufacturers don’t like the fact that it does not respond fast when there are air flow changes and it is small in size compared  to the other type.

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