nissan pathfinder mass air flow sensor problems

I replaced the couplers and have not had the P0101 code since. I was pulling my intake manifold to install a spacer and I found tears in both intake couplers (at the airbox and throttle body). My idle oscillated a bit sometimes when stopped, but other wise the truck drove great. I was having this same problem in my 2011 Frontier with DTC P0101 and didn't have drivability issues. I know this is an old thread, but it comes up when doing an internet search of 'nissan frontier xterra p0101'. I have been using a K&N drop in filter for the last 15,000 miles or so (I have heard that the oil from these can potentially cause issues with MAF sensor) If there was a real issue with the MAF sensor, I imagine the truck would idle roughly, stall, etc. I'm debating on whether or not I should take this in to dealer. Two weeks after this, the code came back on again. This time, after clearing the code, I cleaned the MAF sensor, checked the air filter, and made sure everything was snug with the airbox.

Got home, read the code (same po101), then cleared it. Now, fast forward to February of 2016, the 'Service Engine soon' light reappeared on the way home from work around the same area as last year, and around the same temperature, and the truck still runs fine. I got home and read the code, and discovered it was a P0101 code - Mass or Volume Air Flow Circuit Range/Performance Problem. Back in March of 2015 on a colder day (below 20 degrees) I left work, and within about 1 mile, my 'service engine soon' light appeared while stopped at an intersection.

Nissan pathfinder mass air flow sensor problems