We have the same issue. Light throttle, 1200rpm, transmission will bump and if you stay light on the throttle and let it malfunction, it will cause the check engine to flash (4 times?).
First trip to dealer they could not replicate it and no codes were stored. I'll be taking it back in soon.
They'd better figure it out, or we'll be trading it in on a Lexus. Made the jump to Nissan because the Armada was so promising.... regretting it already. Seriously, my wife loved it at first, now she says she basically hates it.
I'm not this irrational... My Titan xd has some driving issues, transmission and torque management, but im willing to work through them with Nissan. If they dont figure it out though, I'll be gone too.
I'm seriously disssapointed so far. The last 10yrs I was in a Toyota, and the last 8yrs she was in a Lexus. Only a couple minor issues that were taken care of immediately. (CD player and paint issue)
We've got seemingly bigger issues within a month of ownership with Nissan... Yikes!