The Nissan Sentra Mass Air Flow Sensor determines vehicle engine performance by analyzing entering air volume which it sends to the PCM for control. The correct air/fuel mixture depends on the fuel injection adjustments which can only be achieved by using precise information from the sensor. Different Mass Air Flow Sensor such as vane meter (VAF) and hot wire sensors exist in all Nissan Sentra vehicles models. Airflow measurement through VAF sensors operates with a spring-loaded vane while experiencing limitations due to restricted airflow together with mechanical deterioration. Hot wire sensors display higher precision through current measurements made on heated wires when airflow occurs yet the Mass Air Flow Sensor may react to pollutants in its environment. A group of precision airflow sensors operates through hot film and karman vortex mechanisms alongside the hot wire and vane meter approaches. Requisite maintenance should be performed regularly to ensure the Nissan Sentra Mass Air Flow Sensor functions properly.
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