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This is the Maf sensor that causes the engine to crawl. After being scanned using elm 327 bluetooth and the P0102 dtc results which show there is a problem with the maf sensor. elm 327 bluetooth scan thank God the check engine light is no longer on. So this is the cause of the check engine light on and the engine slows down when on the gas. Hopefully this video is useful... greetings to viewers who are loyal to this channel By Ider Pomen.