Here are some common symptoms of a bad or failing throttle position sensor to watch for: 1. Car won’t accelerate, lacks power when accelerating, or accelerates itself. It may feel as though the car simply doesn't accelerate as it should, and jerks or hesitates as it picks up speed. It may accelerate smoothly, but lack power.
The mass airflow sensor (commonly abbreviated to MAF) is one of the most important engine management sensors. A bad mass airflow sensor can leave your Subaru Forester's engine running rough, or even inoperable. A MAF sensor measures the density of the air entering the intake manifold. It passes this information onto your Forester's ECU.
4 days ago · The mass airflow sensor measures the amount of air entering the engine and sends this information to the engine control module (ECM). If the mass airflow sensor is malfunctioning, it can send incorrect information to the ECM, resulting in a lack of power. Replacing a faulty mass airflow sensor can often restore power to the engine.
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e46 mass air flow sensor symptoms
