It’s important to remember when selecting a MAF sensor for replacement that quality is critical. What to remember during MAF sensor replacement The “check engine” or “service engine soon” light comes on when the engine computer detects a fault in one of the components of the emission control system. In this case, a replacement becomes the equivalent of a long drain oil service… it almost becomes a service-style repair.Ī problem with the Mass Air Flow sensor often causes the “check engine” or “service engine soon” light in the vehicle instrument panel to illuminate.
For example, with small or compact cars, the MAF sensor can clog quicker, as it is placed in a smaller engine bay and subjected to more risk in critical areas (oil vapour flows and combustion debris). There may also be a more frequent need to refuel.Ĭontamination could even occur as early as every 18,000 – 25,000 miles, depending on the vehicle model.
WHAT CAUSES MASS AIR FLOW SENSOR PROBLEMS DRIVERS
Drivers often notice sluggish performance, rough idling, poor acceleration or even stalling. As air, dirt and other debris gets into the sensor the parts become contaminated and fail. This measured value is required by the engine management control unit to calculate the amount of fuel required.Ĭontamination is a key reason why MAF sensors fail and require replacement.
This heat flow serves as a parameter for the respective quantity of air intake by the engine. In order to compensate the constant temperature difference between resistors RT and RS again, the flow through the resistor RS has to be controlled dynamically by the electronics. The second resistor (RS) is used to record the air throughput.ĭepending on the amount of air intake, the resistor RS cools down to a greater or lesser extent. The first resistor (RT) is a temperature sensor and measures the air temperature.
There are two temperature-dependent metal film resistors attached to a glass membrane arranged in the air flow.
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