hey all, my car is in the dealer as we speak, and has been there since 8am....it is now 2:26pm. I took it in because after I changed my oil, my check engine light came on. At the dealer, the guy asked me if i had any aftermarket engine parts...I said, yes, a cold air intake and headers. He basically said that if I have blown an O2 sensor due to the aftermarket parts, the cost of repair is not under warranty. ok. So how do i know if they are yanking my chain about the aftermarket stuff being the cause of the problem? I think I just knocked a wire loose when putting the damn oil filter in, but that's just my own personal guess. By the way, I have an AEM CAI, and DC sports 4-2-1 ceramic headers. Let me know what I should be cautious of, and what problems can even be POSSIBLE with this setup. I dont wanna get screwed by the dealer is basically what it comes down to.