Dang,
I have intermittant CEL's all the time. I just got one on Monday, and it has yet to go away. Oh well, drive it!
It turned on when I was stuck in traffic headin down I-80 at 3pm. About 100 degrees out with the AC on and full load of people and a full load in the trunk. I assume O2 sensor, it will click itself off soon enough.
might have to check the code with the laptop if it doens but I'm just too lazy to care.