Trouble code

I also have a 2005 Grand Cherokee with the same code. It has been coming up every couple of months since about 38000 miles and I have 45000 now. There are no symptoms, it just happens. After a couple of "normal" drives, the check engine light goes off. I called my local Jeep dealer and even they had to look it up. It is an "Electronic Control Module" code. The dealer said they couldn't tell anymore unless the code was active and I brought my Jeep in for them to hook it up on their computer. The only thing they could tell me is that since it is so sporatic it is probably just a loose connection somewhere. I don't know. I have just come to terms that my Jeep is possessed!