Since I purchased my GT, the check engine light has been coming on and off. It usually only stays on for a few minutes every 2 weeks. I went to AutoZone while the CEL was on, and they gave me this code.. P1443. It says on the reciept they gave me, "Evaporative emission control system control valve." First of all, is this that bad? Second, where is this so called valve? If it has something to do with the midpipe, I'm just gonna fix it by an o/r pipe with some MIL eliminators. So, help me please!