Intermittent P0174-00 Code on '13 5.0L V8 w/ 130k Miles

[stone4567]

I know somewhere in this vast body of threads this has been discussed already but I have searched every different combination of words I can come up and I am still coming up short. I was getting a code for both bank 1 and bank 2 running lean a few weeks ago and had an accompanying rough idle. It was pretty clear that my PCV valves were torn and causing the issue so I ordered a fresh pair and popped them on. While I was in there I also put in a new MAP sensor (I had a P0106 code for "Manifold Absolute Pressure/Barometric Sensor Range/Performance" but it most likely was due to the PCV valves as well), new air filters, and cleaned my MAF sensors. This fixed the idle issue and solved the lean code for bank 1 but I am still getting a lean code for bank 2. I smoke tested the car pretty thoroughly while it was warm and can't find any other vacuum leaks but was hoping someone more knowledgeable than I am may have some solutions.

Are there any common leaks I am missing that would not be revealed from a smoke test?

Is it possible just the MAF sensor on bank 2 is bad? I feel like since the system blends the air from both sides of the intake this would create a lean on both banks not just one. I also don't have the GAP tool but have a Foxwell scanner and the readings/voltages for both MAF sensors look consistent/no large anomaly.

Thanks in advance for any help ironing this out.

 

[powershift]

You could try swapping MAF sensors and see if the code goes away. If it does then you need sensors on both channels replaced.