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Engine light on with new exhaust?

derek

Full Member
Joined
Sep 8, 2006
Messages
173
Location
KaLiFoRnIa
Hey all, just put on my new Magnaflow exhaust on a week ago. (sounds amazing by the way) I just got home from a 500 mile trip and noticed that the engine light was on. Could this be from the new exhaust? Any help would be great. Thanks  in advance.
 
yep, I'd guess an 02 sensor also.  Have the code read at your local autoparts store (Advanced Auto, Autozone, ect)
 
Without knowing the code, it could be a loose gas cap, exhaust-related, you name it. 
 
First question is did you replace the headers and cat back or just the cat back. If you replaced just the cat back id check the gas cap light doug had said and after driving 500 miles o2 sensor would come on at around 100 miles of driving. But if you replaced the headers also then that is your problem. I changed my exhaust on my 05 gto ,headers and cat back and the engine light came on like yours after driving 100 miles. Its a common thing which next thing to do is get it tuned.
 
I replaced both headers and exhaust but never had a check engine light come on. That was right before we went to MCM, so I drove over 100 miles easy. Like everyone else said, that could be just about anything.
 
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