well last week I went to change my iol at the dealership ( I always do), and right as they were done with I drove a block and the ses light came on. I was so freaking scared because I thought they would be telling me that It was PR CAI that caused it. Fortunately they said the code was a misfire code and asked me if I ran it low on fuel lately, Of course I said no, but I did that same morning. They reset it and everything was kool. . Now my only problem that day with them is that they did a brakes inspection and charged me $29, for some brakes squealing, but they never took my wheels off because I never gave them the wheel locks key, imagine that.