UK93RX7

The other day I was driving to work on the highway and as I was getting off at the exit, the CEL came on. It was the first time it has ever happened, and went off after about six seconds. Since then, the CEL has come on 3 or 4 more times in the past week. My first thought is that maybe it is because of engine heat. Everytime the cel has come on, it has been during the day with temperatures above 80 degrees. The manual says the CEL means there's a problem with the electrical system. Any thoughts as to what it could be? Current mods on the car are downpipe, catback exhaust, modified intake box, pettit ecu, 10 lbs of boost.

quicksilver_rx7

Did you pull the codes to see what the CEL is ?