A faulty (MAF) sensor, can also turn on, the “Check Engine” light on your dashboard. Is your engine having trouble running or just idles bad? And, does the throttle, decrease at highway speed? Then, it is a possible sign of a defective (MAF) sensor. When your engine runs lean, a failure of the (MAF) sensor, can be a likely cause. Hesitation and jerking, during acceleration.The engine hesitates or drags, while under load or idle.Your engine consistently, runs lean or rich.The engine stalls shortly after starting.Here are some of the most common failure signs, of a faulty mass air flow (MAF) sensor: And, can be similar to when your vehicle has, low fuel pressure. So, a failed mass air flow sensor, causes various driveability problems.ĭon’t be fooled, as a faulty mass airflow sensor, can show symptoms, similar to low compression or low vacuum. This causes the engine computer, to miscalculate the amount of fuel, to be injected. So, a contaminated or failed (MAF), cannot measure the amount of air flow correctly. Signs of a Faulty, Mass Air Flow (MAF) Sensor Then, calculates the correct amount of fuel, to deliver to the engine. The computer uses this information, in conjunction with input from other sensors. So, the voltage required is proportional, to the amount of air flow. And, full throttle, being between, 4 and 5 volts. Hot wire sensors, typically have an operating range of, 0 – 5 volts. As a result, increasing the amount of current needed to keep that wire, at the stated temperature. So, when air passes across the (MAF), it cools the wire inside. I would say the most common one used today, is what is known as, the “hot-wire” (MAF) sensor. However, there actually are a few different types, of (MAF) sensors. So, the mass air flow sensor is always located, in the air stream, before the throttle body. For example, fuel injectors, and camshaft position sensors.Īctually, the mass air flow sensor (MAF), is really part of your vehicles, fuel system. To achieve that, they need the help from, additional sources. Todays advanced electronic engine controls, estimate the right amount of fuel, to be used in any situation. In addition, it also measures, the temperature of the entering air. The mass air flow sensor, measures the volume and density, of the air entering the engine. So, almost all newer vehicles on the road today, use a mass air flow sensor.
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