People also ask


  • What is a mass air flow sensor on a car?

  • A Mass Airflow Sensor (MAF) is one of the components of a car electronic fuel injection system. It is installed between the air filter and the intake manifold of the engine. The mass air flow sensor measures the amount of air entering the engine or the air flow.

  • What should a mass air flow sensor read at idle?

  • It’s always a good idea to test a Mass Airflow (MAF) sensor before replacing it. With the engine at idle, the MAF’s PID value should read anywhere from 2 to 7 grams/second (g/s) at idle and rise to between 15 to 25 g/s at 2500 rpm, depending on engine size. Consequently, what should a MAF read?

  • What kind of problems do mass air flow sensors have?

  • Mass air flow sensor problems Problems with mass air flow sensors are common in many cars, including BMW, GM, Volkswagen, Mazda, Toyota, Nissan and other brands. The sensor element could get contaminated or damaged. For example, in some Mazda Skyactiv engines, a failed mass air flow sensor could cause the engine to crank but not to start.

  • How does a hot wire mass air flow sensor work?

  • A hot-wire mass air flow sensor has a small electrically heated wire (hot wire). A temperature sensor installed close to the hot wire measures the temperature of the air near the hot wire. When the engine is idling, a small amount of air flows around the hot wire, so it takes a very low electric current to keep the wire hot.