Were you driving on a different fuel and did you switch somewhere in the middle? The second thing which could be causing this is a faulting secondary O2 sensor. But since your car is new, I wouldn't recommend testing that yet.
What you should do is a full reset of your ecu. Unplug the battery for 20 minutes. Plug it back in, press the brake pedal 10 times fast (with the car at off). Start the car, let it idle for 5 minutes, turn it off, turn it back on. This will reset the ecu and your car will relearn its fuel map from scratch.
The only warning I can give is be careful of any antitheft code your deck may have. I think the newer oriels might be equipped with an antitheft code which would get triggered by the above method. Ask your dealership if the car has such a code before doing this first.