How to Clean an Audi Mass Airflow Sensor

On an Audi engine, the mass air flow sensor is designed to measure the amount of air coming into the engine through the throttle body, and then send the information to the computer, where it controls the amount of fuel going into the engine. This is critical to the proper operation of the vehicle. If the mass air flow sensor gets filled with dirt and grime, it may not read correctly, causing issues with your engine.

Things You'll Need

• Flathead screwdriver
• Mass air flow sensor cleaner spray

Instructions

1. Pop the hood and locate the mass air flow sensor. It's located between the throttle body and the air filter on the intake tubing and has a wiring harness plugged into it. Unplug this harness, using your hands.

2. Use the flathead screwdriver to loosen the hose clamps securing the mass air flow sensor to the intake tubing. Then pull out the sensor with your hands and place it to the side.

3. Spray the mass air flow sensor cleaner liberally inside of the sensor, making sure to spray the wiring in the middle of the sensor as well. Allow it to air-dry for at least an hour before reinstalling.

4. Reinstall the mass air flow sensor, using the flathead screwdriver to secure the hose clamps to either side of the sensor, then plug the harness back in place.

Resources

• Amazon: CRC 05110 Mass Air Flow Sensor Cleaner