Car will not start due to a error light "Electronic Throttle COntroller disabled on 2004 Pontiac Grand Prix

THe 04 Pontiac Grand Prix has not started a few times for over a couple hours due to Electronic THrottle Controller disabled" and getting Engine Power down or something similar. A few months prior, the car would rev up to about 3or4000 revs every 3secs or so. It only happened several times. Now car will not start at all. Thank you for any input.

Asked by for the 2004 Pontiac Grand Prix