One of my NV200's is throwing code for Mass Air Flow sensor, and goes into limp mode every other day.... 70k miles on the odo
Cleaning the MAF has done no good, I also tried replacing MAF with a remanufactured one from local auto parts store, and nothing changed.
I took the NV200 to dealership, and they told me I needed a new MAF sensor, as well as a throttle body cleaning, fuel injector cleaning, and relearn idle. Total was $760.
We'll see how she runs.... Sucks that these nissan vans aren't very reliable. I'm posting this for anybody who may come across MAF sensor issues in their NV200.