The MAF sensor covered by this tutorial has 5 wires coming out of the connector. To see what this tool looks like, click here: Wire Piercing Probe.Ĭircuit Descriptions Of The MAF Sensor Connector Although not an absolute must, this tool is a time saver of the first order.If you need to buy one or are looking to upgrade, check out my recommendations here: Buying A Digital Multimeter For Automotive Diagnostic Testing.
A digital one that can read Hertz frequency is a must have tool to test the MAF sensor on your vehicle. These are the tools you'll need or may need: Your car or truck or SUV may idle rough and stall.Ī scan tool is one of those MUST have tools to be able check and diagnose today's modern cars and trucks, but for the tests in this article you don't need one. No Power when you accelerate the car or truck. Lean and/or Rich Diagnostic Trouble code(s). P0103: Mass Air Flow (MAF) Sensor Circuit High Input. P0102: Mass Air Flow (MAF) Sensor Circuit Low Input. P0101: Mass Air Flow (MAF) Sensor Circuit Range/Performance Problem. P0100: Mass Air Flow (MAF) Sensor Circuit Malfunction. A MAF sensor diagnostic trouble code (DTC) stored in your vehicle computer's memory. 
The most obvious one is that the CHECK ENGINE light (CEL) will be on on your instrument cluster and driving you nuts. You can find this tutorial in Spanish here: Cómo Probar El Sensor MAF (2005-2007 3.5L GM) (at: ).
How To Test The MAF Sensor on 3.1L, 3.3L, and 3.8L Buick, Oldsmobile, Pontiac (1988-1996). How To Test The GM MAF Sensor: Buick, Chevy, Olds, Pontiac 3.8L V6 Engines (1996-2005). How To Test The GM mass air flow sensor (Early Type): Buick, Chevy, Olds, Pontiac 3.1L, 3.4L, 4.3L, 5.0L, 5.7L V6 Engines (1996-2005). In case this isn't the MAF sensor article you're needing, there are several more I've written and you can find some of them here: This MAF test is done in 3 easy steps.Īll you'll need, to test the MAF sensor (with this tutorial) is a multimeter that can read Hertz frequency (if you don't have one, I've made a recommendation on where you can buy a reasonably priced one below). In this test tutorial, I'll show you how to test the mass air flow sensor to see if it's bad (and lighting up the check engine light) or not.
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