P0100 - Mass Air Flow Circuit Malfunction The following trouble codes are usually associated with a mass air flow sensor: This trouble code can be retrieved with a scan tool. When the air flow sensor signal varies from the expected range, the PCM records a fault and stores the corresponding trouble code, illuminating the Check Engine light on the dash. In addition, a faulty mass air flow sensor might cause the Check Engine or Service Engine Soon light to come on.Ī problem with the air flow sensor could also alter the shifting pattern of the automatic transmission. As a result, a bad mass air flow sensor causes various driveability problems, including a no-start, stalling, lack of power and poor acceleration. Signs of automatic transmission problems.How to check the engine when buying a used car.How to get the best deal on a used car?.Buying a used car: 5 costly mistakes to avoid.It is possible for the wires in the connector to break, causing the mass airflow sensor to not work. When doing this job, the mechanic may recommend changing the electrical connector that connects the mass airflow sensor to the car's computer system. If the vacuum hoses are leaking, it will give the same error code as mass airflow sensor failure. It is common for the mass airflow sensor to get dirty (if the air filter is dirty) and lose the ability to read the amount of air coming in the engine.
If the sensor goes bad, the engine will not know the right amount of fuel to add, causing problems including poor gas mileage, lack of power and more. The computer in the car reads the amount of air coming into the engine from the mass airflow sensor and then calculates the correct amount of fuel needed for proper engine performance. For an engine to perform properly, it needs a specific amount of air-fuel mixture. The mass airflow sensor measures the amount of air entering the engine. All cars take air from the outside and pass it into the engine through the air filter. The mass airflow sensor is a round tunnel made of plastic with a sensor attached inside. What is the Mass Airflow Sensor all about? Service type Mass Airflow Sensor Replacement
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