What is a MAF Sensor?

1 Answers
DelElisa
07/29/25 1:57pm
MAF sensor is an air flow sensor, also known as an air flow meter, and it is one of the important sensors in a car's electronic fuel injection engine. The amount of air inhaled by the engine during operation determines the fuel injection amount of the engine. The air intake serves as a crucial basis for fuel injection. If the air flow sensor malfunctions, the onboard computer will not receive accurate signals, leading to abnormal fuel injection control and affecting the engine's normal operation. MAF working principle: After external air enters the throttle, it flows through the sensor. Once it enters the engine, it carries away a significant amount of heat. The greater the external air flow, the more heat is removed. To maintain the necessary temperature of the air flow sensor, additional current is required to heat the sensor, which then adjusts the air flow size through current regulation.
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