wow, sorry to hear! Any idea what codes were set exactly? Insufficient fuel will cause a bunch of problems, including all of the above. Yes, could be combined with a fuel injector issue, but let's check these other things first.
So, change out the MAP first (stock tune - 2 bar, LME tune - 3 bar) see if that helps. Might need to change both the one in the air intake tube as well as the one on top of the manifold. Maybe even try cleaning them out first. Doesn't seem like the MAPs are an issue, but could be.
If the fuel trims and AFRs don't come back to normal, time to look at the LPFP, fuel pump control module, and the HPFP. Low pressure in the rail could be any of the 3, most likely LPFP/FMCM though.
If that doesn't work, change the O2 sensor (bank 2, sensor 1). If fuel issues are happening anyway, changing before the fuel issues are resolved will likely foul a new one out. You can decide.
A faulty PCM cannot be ruled out entirely. Battery is strong?
You have new plugs installed, correct? In the 2010-12, OEM plugs had a problem with the insulator cracking. TSB
11-8-19
