When I first bought my car, my check engine light was on. I figured it was because of the full exhaust and no rear o2 sensor. It has been on for 2 weeks now and JUST went off yesterday.. No idea why it went off and was curious on why it did this? Lol

The light would come on at first then off again when I started the car, but I read up that the code has to be thrown so many times before it stays on, which it eventually did, but now it's back off.

 

maybe the fron O2 sensor?

 

Next time catch the code before it's gone, again! :}

 

hook up a code reader. i bet the code is still stored in history. post the code here