nitro 2009

Had my nitro here in the U.K about 6 weeks now absolutely love it had no problems so far just a knew wheel bearing next week thats it

Got a P Code that indicates a misfire in cylinder three. I have a 2009 Nitro with 78k miles. No engine trouble to this point. I have read the list of possible sources for the PCode, but anyone here had the same issue? Of the potential origins of the alarm, what is the most likely? I am not...