If this is your problem, your car can’t start (because there is actually no air for combustion.) Therefore, the MAF reports there is not enough air coming. The accumulation of dirt in your air filter will restrict airflow. Here are some common symptoms of P0102 that you should look out for: P0102: Causes, Symptoms, And How To Fix Symptoms Other codes related to the P0102 code are P0100 and P0101. As the result, your car can run just fine when cruising but it will hesitate when you suddenly accelerate. For that reason, there is a delay in the air-fuel ratio adjustment. The problem is that O2 sensors are located after where the combustion takes place. So, what data does the computer take to adjust the air-fuel mixture? Of course, the computer does not believe in this number as it knows it’s an irrational number. The MAF sensor’s voltage being lower than 0.2v is telling the computer that there is little to no air entering the engine. What Happens When The MAF Sensor’s Output Voltage Is Lower Than 0.2v? The number usually ranges from 0.5v to 5v. Therefore, the more air is coming, the higher the MAF’s output voltage. The cooling initiates a decrease in resistance leading to an increase in voltage. This wire heats up during operation and is further cooled by the airflow. Using this data, the computer can determine how much fuel is needed.Ī typical MAF sensor has a sensing wire. The MAF sensor measures how much air is coming into the combustion chamber. This number is telling the car’s computer that the amount of intake air is abnormally low. The error P0102 code is triggered when the Mass Air Flow (MAF) sensor’s voltage is lower than 0.2v for a certain period of time.
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