What is the purpose of an air flow sensor?

[Dana]

The purpose of an air flow sensor is to collect information about the engine's air intake volume. Its function is to detect the amount of air entering the engine cylinders. The air flow sensor, also known as an air flow meter, is one of the important sensors in an electronic fuel injection engine. It converts the inhaled air flow into electrical signals and sends them to the electronic control unit (ECU), serving as one of the fundamental signals for determining fuel injection. It is the sensor used to measure the air flow entering the engine. Symptoms of a damaged air flow sensor include: 1. Decreased engine power; 2. Difficulty starting the engine and unstable operation; 3. Unstable idle speed; 4. Poor acceleration; 5. Intake manifold backfiring; 6. Black smoke from the exhaust pipe.