Very possible. Problem could easily be "upstream" in the plugs, the fuel mix, air flow, etc. Asymptomatic, but have you logged data yet to check timing & fuel performance?
Clean the MAP sensors, they can get dirty especially if you have an "oiled" air filter or an underperforming PCV system.
If a calibration update does not fix it, the PCM and/or its' connections may be suspect.
EDIT: Hyundai also issued a TSB for the same issue with some of its' vehicles:
http://www.myhyundaiforums.com/09-FL-012(2).pdf
EDIT: Change to a different gas station/grade on last fillup?
EDIT: Sometimes it can be the grounds, at least that's what Nissan fixes here
http://www.alldatadiy.com/techtips/ALLDATA/20091031.html