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Just open up your air filter housing and you will see a small protrusion with two tiny wires on the top inside of the housing. I would suggest you get carb cleaner and then a small cotton swab and make sure those wires are bright and shinny. This may very well solve your problem and save you a great deal of money for a new sensor which is very expensive.

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18y ago
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Q: Where is the mass air flow sensor on a 2001 Toyota Corolla and how does one go about replacing it?
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