Check your gas cap... If not, may be the standard EVAP TSB. Almost every '09 had this issue between 500 - 5000 miles. Don't worry about it. Just take it in when you can, and it'll get fixed.HELP.....just my luck, i go back to the car 3 hours later to wash it and upon cranking the engine it says "Engine System Malfunction"
Again i drove this off the showroom and put 200 miles on it, non-stop, parked it 3 hours, went back. It was serviced according to carfax at 4700 miles, and the nissan place i bought it which took it on trade said they serviced it before they sold to me - although not sure on that one
Going to post in tech forum also