Slide the new sensor probe into the flow tube with the latch tang up toward the slot end of the tube.Ĩ. Handle the sensor connector only (never touch the electronics as this may damage the sensor probe). Carefully open the sealed new sensor package. Remove the product key and slide out the old sensor by grasping the connector. Pry on the sensor rim until the O-ring is out of the flow tube.Ħ. Insert a small 1/8” screwdriver into the gap between the circular rim on the flow tube and sensor. Gently depress the product key in the slot.ĥ. The tab on the product key should be nearest to the connector side of the slot. Place the key into the center slot of the MAF sensor assembly. Remove the product key from the bottom of the new sensor probe package.Ĥ. Place the MAF assembly on clean workbench with the center slot facing up.ģ. If there are no cracks, follow the remaining steps to replace the MAF sensor probe unit.Ģ. If there are, you will need to replace the entire unit not just the probe. Inspect the flow tube to ensure there are no cracks in the plastic housing. Once it’s determined the mass air flow sensor requires replacement, the same servicing procedures are followed to remove the failed sensor assembly.ġ. If you enjoyed reading this article, don’t forget to share it on Reddit, Facebook, or your favorite car forums! We appreciate your support.MAF sensors can be installed two ways: as a complete unit including the flow tube or as a probe-only design as the ones available from Delphi, which provide technicians a greener, more cost-effective option, said the company. What type of MAF sensor do you have on your car? Let us know by leaving a comment below! As mentioned earlier, it’s located between the air filter housing and the intake manifold.ma You can use a flat-head screwdriver to pluck it out.Īlso, it’s recommended that you swap out the existing air filter if you’re replacing the MAF sensor. Replacing a MAF sensor is pretty simple too. Concluding ThoughtsĪs long as you keep your MAF sensor clean and keep an eye out for the symptoms listed above, it will last for several thousand miles. Aftermarket MAF sensors, on the other hand, are relatively cheaper. For a Porsche Cayenne, the MAF sensor costs $625. However, some high-end OEM MAF sensors can set you back by $300 excluding installation charges. The replacement cost of a mass air flow sensor can range from $89 to $380. The price of a replacement MAF sensor depends on whether you’re wanting to buy an OEM replacement or an aftermarket unit. If none of these is the culprit, you may have to replace the MAF sensor. Simply cleaning the sensor can help, but make sure to do it properly. Vacuum leaks, a clogged-up air filter, or plugged catalytic converter can also cause faulty readings. That said, low mass air flow readings do not mean the sensor is bad. The goal is to check whether your MAF sensor is showing a lower air flow reading versus a normally functioning sensor. In modern cars, the only way to test the mass air flow sensor is with a scan tool. However, to test whether it’s functioning correctly is not that simple. If you’ve started to experience some of these signs, it’s best to get the MAF sensor tested. Rich or lean idling can also be attributed to a failing mass air flow sensor.Īs mentioned, if the system finds problems communicating with the sensor, the ECU will throw a check engine light (caused by diagnostic error codes P0100-P0105) and can even engage limp-home mode. Other noticeable issues include difficulty starting the engine, hesitation to accelerate, and engine drag under load.Īdditionally, if you notice the engine jerking under acceleration, chances are the MAF sensor is on its way out. Problems range from rough idling to increased fuel consumption. Symptoms of MAF Sensor FailureĪs the MAF sensor gets contaminated or starts to fail for other reasons, you’ll notice several drivability issues with your car. Listed below are some possible symptoms of a falling unit. Also, if your air filter is of the washable type, make sure to not over-soak it as it can damage the mass air flow sensor.
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