Rick's Free Auto Repair Advice

P0101

P0101 Mass or Volume Air Flow Circuit Range/Performance Problem

The Mass Airflow Sensor (MAF) measures the temperature and volume of air flowing into the engine. The computer uses that information to calculate air density. With an air density value, the computer can then determine how much fuel to add to the air.

Maf sensor, mass airflow sensor, free wiring diagramThere are two basic MAF sensor designs — analog and digital. The digital style usually uses three wires—12volt power, ground, and a third wire to carry the digital on/off signal to the computer. The on/off signal varies in frequency, depending on the amount of airflow through the MAF. To test a digital MAF you need an automotive scope.

Click here to find MAF sensor for your vehicle

For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat

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