On vacation - 35d check eng light

[Ngkx535d]

As the title states, on vacation and about to head back home tomorrow.
Unfortunately I have the following codes: (via iPhone w/Carley)

- 004BC6 Intake (reference signal for air mass meter)
- 004831

Vehicle seems to run as usually. Only thing I can maybe notice is a bit more deisel sound, but that can be my mind playing tricks.

I’ve done my homework and still confused. I’m not sure if it’s my actual MAF or the air temp sensor on the charge side (which I have no idea of where that’s locate).
I keep reading that if my MAF is actually bad, then I’d be in limp mode or loss of power. So I’m leaning towards the temp side.....but wanted to ask you guys for any input.

Thanks