I've noticed my 2010 Pathfinder SE has been idling rough lately(rougher than normal) when sitting at red lights. When in gear it idles at about 600RPM whether the AC is on or not. Is that low? When it's not in gear it still idles about 600RPM but it's not as rough, but it is still rough.
My Pathfinder has always vibrated more on idle that other cars/trucks that I've owned, I figured it was just a characteristic. It has 31K miles on it.