Twice in the past year, my 2013 Sahara's check engine light has come on. Each time the OBD II code was P2271 "O2 sensor signal stuck rich, bank one, sensor 2". First time was in December 2016 while traveling on the interstate at highway speed. Second time was last week while traveling west out of Raton, NM toward Taos, NM. Each time I have taken my Jeep to a Jeep dealer and each time I have been told the code is a "stored" code and does not indicate an "active" O2 sensor abnormal condition. Each time the dealer erases (resets) the code and tell me it's just an intermittent event and there is no current issue. The Jeep is running ok and the fuel efficiency has not changed that I have noticed. Is this something I need to be concerned with? Thanks.