However, i believe you said above that the truck has no mods on it,
therefore i would think the quite possible your HPOP is going bad. Thats what it sounds like to me.
Carolina??? 37 lbs of BOOST? THAT AIN'T STOCK!
Max boost from a stock truck, is going to be about 17 lbs.
Our HPOPS VERY SELDOM go bad, they are inferior for higher performance applications, but they very very very seldom go bad.. (Read, I HAVE NEVER heard of one literally failing!)
I also think it's a fuel problem, weak pump, clogged filter, ect... Your 37 lbs of boost tells me you are NOT STOCK! LOL ,, so the ICP P1211 is normal. And probably irrelevant. (Your chip is calling for more than the HPOP can deliver, as most do)
You should check into the Stealth HPOP, definitely will eliminate that code, and supply all the oil you need.
But Noisy injectors, sounding like they are dry, ect... would point to fuel starvation IMHO. (I had a fuel pump fail, man, these things sound TERRIBLE when they run out of fuel,, scary bad)
And from what I know, fuel problems seldom set any codes, I would check the pressure by simply hooking a hose onto the drain on the passenger side, Run it down through the cross member and have someone open the drain on the bowl while the key is just turned on. The pump should fill a quart container in less than 15 seconds IIRC. This would mean you have at least a gallon a minute from your pump. This would be a minimum I believe. If it is less, I would replace the pump, (You could drop the tank and check for any clogging in there, but I have had a couple of tanks down on different trucks. Never seen one dirty, though some claim they have seen it.