I think you are in limp mode. The electronic drive by wire throttle is completely dead. There is a conventional cable as a backup that will open the throttle butterfly too, but the ECU limits the maximum speed/power of the engine to almost nothing.

Try this thread for the code reader: http://www.peachparts.com/shopforum/tech-help/209384-cel-reader-dummies.html. Or try googling up "code reader Arthur Dalton site:peachparts.com" and reading through the threads.