Mass air flow (MAF) sensors are key components of fuel injection engines, as they measure the amount of air entering the engine. The powertrain control module (PCM) needs information from the MAF sensor to properly determine engine variables such as air-fuel ratio and ignition timing.
The MAF sensor is usually located between the air filter box and the intake hose. It’s usually visible as soon as you open the hood, but you may need to remove some electrical connections and the air filter box itself to access the sensor.
The actual location of the MAF sensor may vary per vehicle. For example, in a 1997-2003 Ford F-150, the MAF sensor is located inside the air filter housing. You’ll need to remove the air filter before you can gain access to the inside of the air filter housing. In a 2007-2013 Chevrolet Silverado, the MAF sensor is located on the intake hose. It’s immediately visible when you lift the hood up, and you’ll only need a screwdriver to remove it.
Tips on How to Access the MAF Sensor
Before removing the MAF sensor, you should remove the wiring harness that’s connected to it. You can do so by simply pressing on the tab located somewhere along its side and pulling the wiring harness out. Some mass air flow sensors don’t use conventional Phillips screws and use Torx screws instead. It might be useful to have this ready if you plan on conducting a replacement yourself.
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