New Prius owner, but with issues :(

Update:
Well, the experts on here were right. The reason the codes didn't come back is because it only happens after driving 25 or so miles, which I did today. Same lights popped up. Soooo it's at the dealer now getting checked. Worst case scenario is a bad trans-axle. The service writer did say they might be able to put in a salvaged unit if that were the case, and I still have a limited warranty from the dealer I bought the car from so maybe this won't cost me an arm and a leg. I still love this car.