There are lot of possible reasons for a Air Mass Sensor to fail.
The Air Mass Sensor, also known as Mass Airflow Sensor, Air Mass Meter, Mass Airflow Meter, MAF or AFM essentially measures the amount of air that passes through to the engine to create an air / fuel ratio that allows your car to reach its full potential and efficiency. The sensor on MAF device is very sensitive and can be easily contaminated by dirt, debris and oil. This fault may not then show up on your diagnostic system as your cars computer may think the device is still working within its limit which it considers to be ok. This then means that there may be a lack of power, high fuel consumption, poor starting and stalling. Continue Reading