[catera00]

I've owned my Cat for about 3 years and the longest amount of time the Check engine light has been off was one month strait. Its always somethin with this car. But when I first bought it, it was in and out of the dealer for a month troubleshooting the CHeck Engine light. They couldnt figure it out either and replaced a bunch of stuff like MAF sensor, coil pack, a couple fuel injectors. Finally the figured out it was a bad head gasket. It went about a month till the CEL came on again. This time it was some other problem, followed by another. You get the idea. So maybe you have some bigger problem that is causing the CEL. Mine was coolant from the headgasket leak messing up the 02 sensors or something. Good luck with it!