![]() ![]() This sensor is necessary to determine the amount of fuel injection, when to fire the cylinders, shifting of gears, and calculate the exact air-fuel ratio/flow rate. Air Flow Sensor or Mass Air Flow (MAF) sensor is one detection device, which can convert the amount of air entering the vehicle’s engine into a voltage signal to calculate the load of the engine. If it doesn’t, the MAF need to be cleaned or replaced.In automobiles, there are various sensors to control all engine functions and work to indicate failures and protect the vehicles from damage. While the car is idling, unplug the MAF sensor, and the car should stall. The sensor is located between the air filter and the intake manifold. Diagnose MAF SensorĪfter making sure that the air filter is clean, the MAF sensor is your next target. If it is the case, have your air filter cleaned with recommended cleaners.Īlternatively, when the air filter gets severely damaged, replacing it is the best option. Diagnose Air Filterįirst, open the hood and inspect the air filter to confirm if it is clogged or contaminated with debris. P0102 Causes Identification: How to Diagnoseįollowing the recommended diagnostics process is the first step in resolving the P0102 code. Installing this module will take about half an hour and require professional assistance to ensure proper operations. It may also result in the engine’s failure to start. A faulty PCM causes the vehicle to require multiple attempts before starting up. Cause #4: PCM Issues (rare)įinally, the Powertrain Control Module (PCM) will rarely be the source of your error code. These could lead to false voltage readings as well. The wiring could also be near components that consume higher voltage, such as alternators, ignition wires, etc. Cause #3: MAF Sensor Wiring Harness Problemsĭamaged MAF sensor wiring harness can contribute to your P0102 error code. The decision to replace your MAF sensor should be taken after a proper diagnosis. This leads to the MAF’s voltage drop and it underreports the intake air mass. When the sensing wire inside the MAF gets dirty, airflow can not cool it down properly. This is an easy task and you can totally do it by yourself. P0102 caused by a dirty air filter should be resolved by cleaning out the clogged air filter. 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. Hesitate when accelerating Causes Cause #1: Dirty Air Filter.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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