Got myself a 6 string a few weeks ago which I'm loving

I have noticed however that I get a slight buzz during the initial attack when playing E at the 16th fret on the top (C) string. All other notes are fine on all strings so I'm pretty sure the 17th fret is just a fraction too high on the top side.
Is this easy to sort? I'm no dummy and quite practical so I'm happy to fix it myself if someone knows how...
(unless there is a danger I can really screw up my new baby in which case I'll take her to a local tech)