In the presence of air and fuel in the combustion chamber, the spark plugs ignite when you start your car.īut it fails to be ignited if your car doesn’t get the required airflow when starting. If you experience difficulty starting your car, it may mean a bad mass airflow (MAF) sensor. When an engine consumes more fuel than it usually does and fails to control the extreme heat, it produces black smoke to save your car engine from more damage. If you notice black smoke, sometimes grey smoke emits through your tailpipe or exhaust pipe, another symptom of a bad mass airflow (MAF) sensor.
#Bad mass air flow sensor code#
This happens when the engine control module gets an error code from a bad mass airflow (MAF) sensor. The check engine light turns on to make you aware of a problem with the engine. When the check engine light of your car’s dashboard illuminates, it indicates one of the symptoms of a bad mass air flow sensor. This way, you’ll be able to work on them before it’s too late. Now we will break down every faulty mass air flow sensor symptom. Symptoms of a Bad Mass Air Flow (MAF) Sensor
#Bad mass air flow sensor full#
Why a Mass Air Flow Sensor Becomes BadĪ mass air flow sensor always comes in touch with flowing air, which is full of pollutants like smoke and dirt as a result, a mass air flow sensor becomes dirty and cannot perform well.Īn excessive voltage supply may sometimes burn the circuits, which keeps them from supplying information to the Electronic Control Unit (ECU). The quantity of air which is entering the engine is adaptable. Then the balanced current will be transferred to the ECU to be converted into voltage or frequency that is transported as airflow. When there is a variance in temperature between the two sensor wires, the airflow sensor will automatically rise or decline the current flowing through the hot wire to equilibrate. The heated wire cools down as air passes through it. Two sensors are included in the airflow sensor- one becomes warm when electricity flows through it, and the other does not. Keep scrolling! How a Mass Air Flow (MAF) Sensor WorksĪ mass airflow (MAF) sensor is found between a throttled body and an air filter. If your car emits black smoke, faces difficulty starting, or consumes more fuel than usual, you should understand that your vehicle has a bad mass airflow (MAF) sensor.īefore knowing the symptoms of a bad mass air flow sensor, you should know the function of a mass air flow sensor and the reasons for its malfunctions. This way, the ECM (engine control module) can hold the proper balance between air and fuel in the combustion chamber. It estimates the total fuel your car’s engine draws into it.
A mass airflow (MAF) sensor is part of a car’s electronic fuel injection system.
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