How to clean the flowmeter (Maf sensor)?
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Flowmeter (MAF) Working principle; the air entering the engine passes rapidly through the flowmeter. This air entering the engine continues its path by passing through the film resistance heated to approximately 120 degrees Celsius. While passing through the film resistance, it also cools this resistance. The electronic control unit wants to keep the temperature of the film resistance constant and sends more current to the cooling resistance. The cooling rate of the film resistance depends on the amount of air passing through it. As the engine speed increases, the amount of air taken into the engine increases. If the amount of air passing increases, the amount of current sent to the flowmeter also increases. Thus, the mass of the air taken into the engine is calculated from the change in the current sent to heat the resistance with the amount of air passing through it. What should be noted here is that the mass of the air taken into the engine is measured, not the volume, so that the amount of air entering the engine is determined more accurately. Because the volume of the air changes constantly depending on the air temperature and the amount of oxygen in it will be less than in cold air when the volume of the heated air is considered. In order not to be affected by this volumetric change, the mass of the incoming air is measured. The engine control unit instantly determines the amount of air taken into the engine and changes the amount of fuel sent to the engine by controlling the injectors. When too much air enters, it extends the injection times of the injectors, allowing more fuel to be sent. The engine determines the amount of air taken into the combustion chamber very precisely, adjusting the most ideal injection amount. Thus, fuel economy is achieved and engine performance is increased. There is a temperature sensor in the flow meter. Related OBD fault codes: P0100, P0101
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