After clearing the codes, they didn't come back. The service light is still on but I suspect it has to do with my brakes. My indie mechanic who knows his stuff said that's what it was and he's very good.
That said, I'm going to sell this mod and put the money towards a sub from Musicar NW. I think I'll appreciate it much more. Here's my for sale post if anyone's interested:
http://www.e90post.com/forums/showthread.php?t=781921