Your engine needs a perfect air-fuel mixture in the combustion chamber for optimal performance. But, if your check engine light is illuminating you want to check the diagnostic trouble codes first with an OBD2 scanner. However, the engine control module does not always recognize a faulty MAF sensor, so it may still be defective even if there is no engine light on your dashboard. Therefore, if your MAF sensor is faulty and sends wrong information to the engine control unit – the check engine light will illuminate your dashboard.
If a sensor sends an incorrect signal, the ECM or PCM will turn on the check engine indicator light. The engine control module monitors all sensors in the car engine to ensure that everything is OK. Here is a more detailed list of the most common symptoms of a bad mass air flow sensor: Check Engine Light Illuminates Hesitation, rough or jerky accelerationīecause the mass airflow sensor is directly connected to the engine control system, any problem can interfere with performance.The main symptoms of a bad or failing MAF sensor include: The most common symptoms of a bad mass airflow sensor are a check engine light on your dashboard and engine performance issues.
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