Replacing an old or worn out Mass Air Flow Sensor is difficult and should be left to a professional. Don't own a scanner? Get assistance at your nearest Nissan service center. Connect an OBD-II scanner to the on-board computer in your Nissan to see if the scanner returns a Mass Air Flow Sensor error code. Since an old Mass Air Flow Sensor can affect engine performance, it may trigger your Nissan's check engine light.
If the engine is running lean, your Nissan might have trouble starting, or you may notice decreased performance or backfires when decelerating. If the Mass Air Flow Sensor is worn out or damaged, it may cause your engine to run lean, meaning there is too much air or not enough fuel in the air-to-fuel ratio. Your Nissan's computer takes in the information that the Mass Air Flow Sensor gathers and determines the amount of fuel that's necessary to maintain the correct ratio of fuel to air.
The Mass Air Flow Sensor is positioned between the engine's air filter and intake manifold and measures the amount of air that enters the engine through the engine air filter. The Mass Air Flow Sensor on your Nissan performs an essential function in the electronic fuel injection system.
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