One month old car with about 670 miles on it. Got a full tank of gas this afternoon and when I started it up, the “Emissions systems problem. Power may be reduced. See your dealer.” alert came on. Car didn't go above 15-20 mph. Pulled over, turned engine off and checked manual before attempting a restart when it stayed on till I got back home 5 miles later. Turned it off, called the dealer but their service dept was closed as it was Sunday. After 5 mins, I started it up again and the warning had disappeared. a few hours later drove it about 11 to 12 miles and no warning at all. The inconsistency is disconcerting to say the least. Have to call dealer on Monday to see if they will check the car or expect it happen again before they are willing to have me bring it to them.