So my service engine light went on the other day, then turned off part of the day today and is now back on. I just installed a cat-back exhaust a few weeks ago and made sure everything was all bolted firm but i jacked her up and looks like the slip joint with the clamp may have loosened a bit. Appears to be a tiny leak there somewhere.

so my question is, would this small leak be enough to trigger the light going off? I may try that or just get the code and see what it is tomorrow.

thanks!

 

My money is on a bad sensor.

 

yeaaa I've been reading up on it the past day or so and bad sensors seem to be quite normal for '05s Might go to autozone and get the code tomorrow but I'm praying it's that little leak (although all sensors are before the cat I believe....)

 

Still under warranty for an 05' if it is an o2 sensor....for 100,000 miles/10 years anyway. If the exhaust leak is after the sensors...behind the Cat...it would not cause a light.