One problem related to o2 sensor has been reported for the 2013 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Nissan Altima based on all problems reported for the 2013 Altima.
Brand new vehicle just shy of 1 year bought and check engine goes on twice for reprogram of oxygen sensor, once in town before thanksgiving week in November 2014 and a second time while out of town for the thanksgiving holidays. Frustrating that I took the vehicle in to the dealer to get fixed and it wasn't done the first time. It looks like they just cleared the system and the light and it came back on while out of town for the same problem.