However, the sensor can also malfunction earlier. With a noticeable loss of performance and high mileage, a defective MAF sensor should definitely be considered. As the mileage increases on your Forester, it can happen that increasingly inaccurate values are sent to the engine control unit. The mass air flow sensor is a wearing part. What causes MAF sensor to fail in Forester? This can cause the engine warning light to illuminate in the instrument cluster and the fault can be read out by a diagnostic device. The engine runs too “lean” or too “rich”. The optimal amount of fuel can no longer be calculated which results in either too little or too much fuel injected into the combustion chambers. If the MAF sensor is defective or dirty, it does not send correct measured values to the control unit of Forester. What happens when MAF sensor malfunctions in Subaru Forester? MAF sensor location in Subaru Forester 5th generation. It is not only important for power delivery in your Forester, but also for the lowest possible pollutant emissions.
The mass air flow sensor is part of the engine’s intake system and is located between the air filter box and the throttle valve. Dirty or faulty mass air flow sensor (MAF)ĭefective or dirty mass air flow sensor (MAF) in your Subaru Forester can result in loss of power, uneven engine running, erratic idling, misfires, poor exhaust emission values including black smoke. So this is the first thing you should check. Replacing the filter on your Forester takes a few minutes and does not require any special knowledge. In the worst case, the engine can stall if the air filter is extremely clogged. This ultimately also increases fuel consumption. If the air filter is dirty in your Subaru Forester, it can have a negative effect on the performance of the engine, as less air passes through the dirty filter which suffocates the engine.
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