How to Clean a MAF Sensor
A mass air flow (MAF) sensor is a simply device located on the intake side of the motor. As incoming air enters the intake on its way to the manifold, the MAF's heating element sends a signal to the car's electronics to let it know how much air is entering the motor. If the sensor becomes contaminated with dirt and oil, the signal is negatively impacted and can lead to a rough idle and even a "check engine" light. Cleaning the MAF sensor is relatively easy and takes minimal expertise.
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Instructions
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1
Remove your vehicle's air box if it is the way of the MAF. This is usually located on the left side of the motor as you are looking at the car, but may vary depending on the model. The air box is held on with tabs or clips that are undone or screws that are removed, allowing the airbox to be removed.
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2
Disconnect any air hoses, sensors or wiring harnesses that are attached to the air box. The MAF itself will have wiring harness that goes to it and which needs to be disconnected. Tuck the plug or clip for the wiring harness out of the way.
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3
Remove any bolts and loosen any hose clamps that hold the MAF in place. The MAF is usually located between some air intake tubing and is fastened to the tubing with large hose clamps. The MAF housing may also be bolted to the car. Remove these bolts with a socket and ratchet. Set the bolts aside.
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4
Carefully pull the MAF away from the airbox and the tubing. You may need to wiggle the MAF a little to remove it. Do not damage the MAF.
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5
Spray MAF housing cleaner (available at auto parts stores) onto the entire MAF, including the screen, the sensor and the plug area. Also wipe the inside of the intake tubing with the cleaner and microfiber cloth to clean it. Wipe any excess cleaner from the MAF with a microfiber towel.
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6
Reinstall the MAF in the engine in the reverse steps of removal. Ensure that everything is tight so that there are no air leaks. Start the vehicle to make sure it is running properly.
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