My check engine light was on for about a week (haven't had time to take it to the dealer) and all of the sudden it just turned off by itself. The car came with Injen cold air intake, plenum spacer, After market headers, and dual cat back exhaust could all of that have something to do with it? Should i really worry about it? What could cause it to come on and then all of the sudden turn off?

 

If the light went out, the dealer will say nothing is wrong and not to worry about it...mine goes on once in a while (mostly at the track) also and it goes out...doesnt really bother me and the car runs fine...

 

I heard when the CEL light comes on, the code has been stored, so the dealer will be able to tell you what caused it. When (if) it comes on again (or maybe just for fun), take it to a local autozone. They will let you use a code reader for free. I had never used one before and it took all of about 30 seconds to read the code.

 

Thats good to know, i'll probably do that since theres an autozone right down the road from me