Last week I had an O/R Xpipe with Magnaflow mufflers installed on my 03GT. It was fine up until today. I started hearing what sounds like a small exhaust leak up towards the manifold. I took it to a shop immediately but they said they didnt find anything leaking. I still hear it and its getting on my nerves.....I know what a leak sounds like. Today my service engine soon light pops on. You think an o2 sensor has come loose? This happened to any of you guys? I gotta get it fixed asap cause I cant listening to it much longer

 

Go get the code pulled and work from there.

 

What did you have fixed. And yes, since i put an x-pipe on my 08 gt my light comes on about once or twice in about 3wk period. but i take the fault out with my Diablo Predator hand held tuner, and it's always the o2 sensor(left bank it says ).

 

Did you install a set of MIL eliminators on the back set of O2 senors? I think this is the problem with the SES light. The leak could be anything, have a couple of friends cover the exhaust tips up and crawl under and find the leak.

Option B. Use your turner to turn off the rear set of O2 sensors and see if this makes a difference with the code. Good Luck

 

id say try checking the exhaust yourself, it could be leaking from the top part of x-pipe/headers connection, use soapy water. If thats the case an idea would be using a little RTV at the connections, whoever installed your exhaust may not have used anything.