These codes could well have been stored by an improperly installed gas cap.
The system will most likely test itself again as you drive the vehicle.
If the lamp doesn't come back in a week, it was probably just the gas cap
The canister is under the car at the left rear. You're not likely to see
anything of significance visually. In a few instances, I've seen
intermittent failures of the canister close valve to seal.
Let it ride and see what happens. It won't affect your performance and
presents no hazard of deeper issues. If the light comes back, then I'd
recommend taking it in and having it checked.