![]() If you have your air flow sensor issues professionally inspected, your Nissan technician may be able to fix the sensor's issue by simply cleaning the sensor instead of replacing it. Replacing an old or worn out Mass Air Flow Sensor is difficult and should be left to a professional. No scanner? Head to your closest Nissan service center for assistance. 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 engine performance can be affected by an old Mass Air Flow Sensor, it may trigger your Nissan's check engine light. If the engine is running lean, you may notice decreased performance, backfires when decelerating, or your Nissan won't start. If you have a damaged or worn out Mass Air Flow Sensor, the engine may run lean, meaning the air-to-fuel ratio either has too much air or not enough fuel. The computer in your Nissan 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 air filter and intake manifold on the engine and measures the amount of air that enters the engine through the engine air filter. The Mass Air Flow Sensor on your vehicle is an essential part of the electronic fuel injection system. Plays a vital role in your electronic fuel injection system. ![]()
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