P0100 - MAF CIRCUIT MALFUNTION

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.

• The Check Engine light comes on.
• The smoke that comes out of the exhaust pipe is black.
• When you start the engine, you may have difficulties.

A diagnostic code P0100 can mean that:

• There may be intake air leaks.
• Perhaps the cables or their connectors that lead to the Mass Air Flow Sensor (MAF) are worn or rubbed, and in turn cause a short circuit.
• The Mass Air Flow (MAF) sensor may be dirty or contain elements that contaminate it.
• The MAF sensor may be defective.

To solve a P0100 code you can do the following:

• Check all cables and their respective connectors that lead to the Mass Air Flow Sensor (MAF). Make sure they are not worn, broken or show signs of wear. Repair or change as necessary.
• Inspect for air leaks in the intake system. Repair if you find a leak.
• Check that the hot wire of the Mass Air Flow Sensor (MAF) is free from dirt or dust. In case the air filter is dirty you can replace it.
• There are intake air intake systems that have a mesh; if that is your case you can make sure it is clean.
• Make sure there are no vacuum leaks under the MAF sensor.
• Perhaps a high resistance in the ground circuit of the MAP sensor (Multiple Absolute Pressure Sensor) is the cause of this code.
• Change the MAF sensor.