Ok so I ended up taking it to a LR/BMW local small shop and they ran diagnostics and a smoke test. It didn't throw any codes for them and didn't leak during the smoke test for them either. However after leaving the shop after putting another 30 miles on it (to get enough to clear emissions testing) it started throwing P1174. I cleared it and drove another 20-30 miles today and got it again. Does that help chase this gremlin any? Still haven't gotten the bank 2 lean since right after swapping the MAF sensor.