Well, here's the good news: this trip to the dealer didn't cost me a penny (except gas I guess). Surprisingly, they didn't mention anything about my aftermarket parts. They just said they couldn't run the proper diagnostics on it because I had cleared the check engine light and erased all of the freeze frame data - which happened because I used my AP to clear the CEL, reset the ECU, and then I flashed back to the stock map and uninstalled the AP before I brought it in. I told them I had the codes read for free at Auto Zone and then cleared the ECU myself by disconnecting the battery. I suppose it was a little helpful that I gave them a list of the codes I threw, and based on that, they suspected that my battery had gone dead at some point - which I'm not so sure about because I never had to jump start it. It had been cranking a little slower than usual lately, but I suspect that's due to the really cold weather we've been having. Also, they said that it could have occurred due to some recent work where my key was left in the "on" position for a period of time. Obviously, I had to do this briefly when installing my AP - maybe they were trying to get me to admit that I had it? I just told them, "Nope, no recent work." I found this question to be a little odd, considering that my check engine light came on while I was accelerating on the highway in 3rd and 4th gear - how could having my key in the "on" position for a little while have caused the CEL to be thrown at a much later time while I was driving? Oh well... at least they didn't discover my AP. I'm wondering though, what's the worst that could happen if the CEL comes on again and I bring the car in just how it is - with the Cobb Stage 2 map on it? Maybe they'll just deny all warranty work and I'll end up having to pay out of my own pocket for them to fix the problem. But if the problem gets fixed and I can safely run the Stage 2 map without any check engine lights, that would be great. Hmm...
- Maybe I have a bad O2 sensor
- When I installed my Perrin crank pulley, if I made the belts a little too loose or too tight, could that have caused the CEL?
- Should I try a different kind of gas (I've been using Shell 93 Octane)?
- I wonder if the K&N panel air filter could be causing problems (possibly if it's dirty? but it's relatively new.. so I doubt that's it)
I can't really think of anything else right now. Oh well, maybe I'll just take it easy for a while and see what happens. Thanks to everyone who read and posted!