2005 Volkswagen Golf 4 cyl Front Wheel Drive Automatic 25000 miles
----------------------------------------------------------------
So i have heard some rumors that it is possible to use a factory radio to diagnose a check engine light. I was wondering if this is true, and if so, how do i do it. also, the reason for my check engine light is most likely because of an afftermarket exaust, and i was told i can replace the factory computer and that will fix the check engine light, but won't the just skrew things up more?