How to Clean the MAF Sensor on a Silverado


The MAF in MAF Sensor stands for mass air flow, and in a Silverado, it's how the engine's computer determines how much air is coming into the intake of the engine. These sensors can see a lot of dirt and grime, and if they get dirty, they won't read the airflow properly. Fortunately, cleaning them is a simple task and can be done in under 20 minutes. In this case, the project vehicle is a 2004 Chevrolet Silverado, but the process is similar for other vehicles as well.

Things You'll Need

  • 1/4-inch ratchet and socket set
  • Flathead screwdriver
  • Mass air flow sensor cleaner
  • Pop the hood. Locate the mass air flow sensor on the passenger side of the engine compartment, bolted to the air filter box. Unplug the wiring to the sensor by hand.

  • Remove the hose clamp connecting the MAF sensor to the intake tubing using a flathead screwdriver. Then unbolt the sensor from the air box using the 1/4-inch ratchet and socket.

  • Spray the mass air flow sensor cleaner along the inside of the sensor, making sure to get the metal wire in the middle completely. Then allow it to air dry.

  • Bolt the mass air flow sensor onto the air box with the ratchet, resecure the intake tubing using the flathead screwdriver, then plug the sensor back into the harness.

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