The car completely stalled while going uphill. It restarted a few minutes after. I received 3 email notifications from infiniti stating that my engine may have an emission control system malfunction. I took the car into the infiniti dealership. They stated that the vehicle test was driven for 24 miles. Could not duplicate customers concern and is not stalling when going up hills. Scanned for codes and found multiple past codes. Drove until moniters were set. Rechecked for codes and no codes were found. No further action required, working as factory intent and design. Called infiniti consumer affairs who stated that they could do nothing else too detect what is wrong with the car.