I have an '03 GT with Bassani X-pipe and high flow cats.Check engine light came on about a month later. Code said O2 sensor. We replaced it and it still comes on reading the same code.
when posting about a check engine light it helps to give the exact code and any differences in driveability. like stumbling, surging, misfires and anything else you can give for info. that helps us out a lot to give advice to you.
ive had my Prochamber o/r H pipe on for almost 2 years now, and the check engine light has been on just as long. all of a sudden, the other day, it turned off..never to return..at first i thought the bulb blew, but it lights up when i crank the car...what could have caused this??