Maf Sensor: I Had a Rough Starting When Cold Issue The Mass Air Flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The Powertrain Control Module (PCM) uses the MAF sensor signal in order to provide the correct fuel delivery for a wide range of engine speeds and loads. A small quantity of air entering the engine indicates a deceleration or idle. Maf/iat wiring diagram for silverado 5.3 - Fixya Nov 23, 2013Maf/iat wiring diagram for silverado 5.3 - 2007 Chevrolet Silverado 1500 2WD. I have a 2007 2500hd and was trying to find this iat sensor wiring so i can install my get a diagram from dealer for the iat not mass air and just hook it up to iat. maf are to exspensive to mess with . tell the dealer you need to replace your iat and need a Mass or Volume Air Flow Circuit Low Input - Engine-Codes P0102 Gmc Meaning The Mass Air Flow (MAF) sensor measures the amount of air ingested by the engine. The direct measurement of the air entering the engine is more accurate than calculating the airflow from the Manifold Absulte Pressure (MAP), the Intake Air Temperature (IAT), and the engine speed (speed/density).
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