05,M6, LT Headers catless mids, custom tune, KN CAI.....Just had my LT's installed about three weeks ago. Last night had to drive for about 20 min at slow speeds to get to my destination and in doing so I had to drive in a higher gear so as not to lose traction on the ice. The CEL came on just before I reached my destination. Car seems to run fine, milage suuuuux but I'm assuming that is due to me having to drive that way. Haven't been able to read which code its throwing. The alternate menu doesn't show me that its throwing any codes.....o2 sensor maybe??