It is necessary to get the right meaning of the engine P0104 Code. Fixing the car engine is necessary. However, this engine code has specific meaning and it is Mass Airflow Electrical Circuit Erratic and Irregular Output. The possible causes of the car engine are the basis of the problem is the sensor voltage is not sending right voltage output obligatory by the ECU. Another reason of the engine code is the most basic problem is too unreliable high air flow from the air domestic the MAF sensor. There are some mistakes available but you need to know exact reason for your car engine and diagnosis is necessary.