Sorry for the interruption. We have been receiving a large volume of requests from your network. To continue with your YouTube experience, please fill out the form below.This is one of the easiest mass air flow sensors to Test. The following Test is an On Car Test that checks the performance of the MAF sensor with the engine running. You'll test this GM MAF sensor with a multimeter that can read Hertz (Hz) Frequency. No scan tool is required or any other expensive testing equipment. In the box titled Applies To: (in the column on the right), you'll find a complete list of GM makes and models (and Isuzu) that use this type of MAF sensor. Now, in case this is not the article you're looking for, there are also 3 other GM MAF sensor test articles: The most important thing to do before starting with the mass air flow sensor test, is to make sure your MAF sensor's wires aren't contaminated with dirt (since the tests in this article assume the MAF sensor isn't contaminated). Because this MAF sensor is a hot wire sensor type that easily becomes contaminated with dirt and stuff if the air filter isn't performing its job (to see an example of a dirty MAF sensor: Dirty MAF Sensor Example (Fly Stuck in MAF Sensor)).

This contamination will appear as a type of ‘fuzz’ on the two wires of the sensor. This contamination will cause the sensor to produce a lower reading to the ECM (Engine Control Module = Fuel Injection Computer). The most common symptom of this contamination is a hesitation or a time-lag in engine response that is felt after the accelerator pedal is depressed. Other symptoms may include but are not limited to: higher tailpipe emissions and diagnostic codes that may illuminate the "Check Engine" light. If the sensor wires are dirty, use an electronics spray cleaner to clean them with. This in itself may solve your problem. I don't recommend using carb or brake clean spray. These solvents can damage the sensor. Also, don't attempt to physically clean the sensor with anything. You'll find all autopart stores sell the correct cleaning spray. If you'd like to see the MAF sensor cleaning process explained step by step click here: How to Clean the Mass Air Flow Sensor. This list is not all inclusive but it does contain the most common symptoms of a BAD MAF sensor are:

Buy online and return core parts to the store to be refunded the price. On Orders $75 or Greater and free shipping to APO, FPO, DPO addresses. Save time by buying online and picking up items in store.What is the Mass Airflow Sensor all about? The mass airflow sensor is a round tunnel made of plastic with a sensor attached inside. All cars take air from the outside and pass it into the engine through the air filter. suzuki c90 air cleaner coverThe mass airflow sensor measures the amount of air entering the engine. clean air carpool georgiaFor an engine to perform properly, it needs a specific amount of air-fuel mixture. novita air cleaner reviewThe computer in the car reads the amount of air coming into the engine from the mass airflow sensor and then calculates the correct amount of fuel needed for proper engine performance.

If the sensor goes bad, the engine will not know the right amount of fuel to add, causing problems including poor gas mileage, lack of power and more. It is common for the mass airflow sensor to get dirty (if the air filter is dirty) and lose the ability to read the amount of air coming in the engine. If the vacuum hoses are leaking, it will give the same error code as mass airflow sensor failure. When doing this job, the mechanic may recommend changing the electrical connector that connects the mass airflow sensor to the car's computer system. It is possible for the wires in the connector to break, causing the mass airflow sensor to not work. Routinely changing your air filter can improve the lifespan of your mass airflow sensor Often mass airflow sensors stop working because of bad connectors or wiring harnesses. Anytime the mass airflow sensor is replaced, the air duct between the sensor and the intake manifold should be inspected. Scan the computer in the car for codes.

Remove and replace the sensor if found faulty. Check vacuum hoses for leaks and cracks. Test drive the vehicle. Changing the air filter on a regular basis will ensure that the car is getting cleaner air and hence performing optimally. If the Check Engine light is on, get the car inspected as soon as you can. If the Check Engine light is flashing, pull over and get the car towed to avoid costly repairs. A mechanic should always inspect the vacuum hoses and snorkel attached to the mass airflow sensor when replacing it. It is possible for these items to have leaks. Replacing the sensor without fixing the leaks will not solve the problem. What common symptoms indicate you may need to replace the Mass Airflow Sensor? Check Engine light is on. Car does not have power. Car may not start. How important is this service? In order to run optimally, your vehicle needs to have a perfect fuel-to-air ratio. As the vehicle is moving, an uncontrollable amount of air enters the throttle body and heads into the intake manifold.

As such, the fuel has to be adjusted to be optimal for the amount of air. The mass airflow sensor measures the mass of the air that is entering the vehicle, and sends the information to the car’s computer management system. This system then controls the amount of fuel that is injected into the cylinders, so that the ideal fuel-to-air ratio is achieved. When the mass airflow sensor stops working, the computer cannot receive information on the air intake, and the fuel-to-air ratio will be wrong. This will cause your engine to run poorly, and sometimes not at all. It will also impact your gas mileage.The mass airflow sensor (MAF) measures the amount of air entering the engine. The OBD-II code P0101 is set when the signal from the mass air flow sensor is out of expected range, or in other words, the MAF sensor doesn't work properly. In most cases, this code is not very difficult to diagnose. The engine computer uses the mass air flow sensor signal to determine how much fuel to inject.

If the sensor doesn't measure the air flow correctly, the fuel injection system won't work properly. - The engine starts and stalls - Lack of power Because the mass air flow sensor readings are used to calculate the engine load, the traction control system may stop working and the traction control warning light might also come on on the dash. For the same reason, the automatic transmission shifting pattern may also change. The most common causes of the code P0101 are: - Dirty, obstructed or faulty mass air flow sensor (MAF) - Cracked, ripped or disconnected intake boot (snorkel) - Vacuum leaks (from stuck open PCV valve, leaking intake gaskets, etc.) - Clogged up or improperly installed air filter - The mass air flow sensor element contaminated by excess oil from an oil-soaked air filter - Clogged-up catalytic converter or restricted exhaust Other possible causes include: - Dirty throttle body - Bad or dirty manifold absolute pressure sensor (MAP)

- Electrical problems with the MAF sensor connector or wiring - Stuck open EGR valve - Incorrect valve timing - faulty engine computer (ECM) First the mass air flow sensor must be checked and cleaned if dirty. Sometimes a foreign object like a leaf or dust can clog-up the airflow sensor measuring element (hot wire) causing this code. See the photo of a clogged up mass airflow sensor below. If the problem started soon after the air filter was replaced, the air filter installation as well as the air flow sensor must be checked. In some cars (e.g. Volkswagen) a metal mesh intake screen installed before the air filter can be plugged up too. It must be checked and cleaned. The intake boot must be inspected for cracks and rips. This problem is common in many European vehicles, e.g. BMW, Volvo. Other possible sources of vacuum leaks must be inspected. The mass air flow can be tested with a scan tool that displays the live data. The airflow sensor readings at different rpms (e.g. 1000, 2000, 3000) must be compared to the specifications or to the readings of a known good sensor.