The Mass Air Flow Sensor (MAF) is located above the engine air inlet duct, under the air filter. Its function is to measure both the volume and the density of the air entering the engine. Although the Mass Air Flow (MAF) sensor only measures part of the air entering the engine, the value given by it is used to calculate the total volume and density of the air entering the engine. The Power Train Control Module (PCM) uses this reading, taking into account other parameters of the sensor and in this way ensures that it will adequately supply and in the necessary time fuel, obtaining in this way a better power and that the fuel efficiency is the best.
When the fault code P0100 OBD2 is established, it implies that the Powertrain Control Module (PCM) has detected that there is a malfunction with the MAF sensor, or even in its circuit. The problem may be in the frequency signal of the MAF sensor, which may not be working within the expected levels.