Dang engine light on three days then off..HUMMM

I had this problem before, I took my throttle body off and cleaned it, it was sticking just a little bit, barely enough to say so. I ended up having to do this twice acttually but it hasn't been bad since.

I had the same problem to. I cleaned the throttle body and the mass air flow sensor. I was told the the one of the reasons this happens is because of some aftermarket air filters. I had a K&N Filter on mine. When you clean the reusable filter the stuff you put back on it is like an oil. That oil ends up sticking to the sensor and the throttle body. the little bit of dust that makes it through the filter ends up collecting on the sensor and throttle body too.

I had the same problem with mine and about 2000 miles later, my catalytic converter started rattling continuously. emissions is still under warrenty and getting the converter changed out today.