HELP!!! Funky acting oil pressure guage and more....

[HVAC SuperTech]

Hey everyone. I was driving down the road the other day and experienced a huge loss in power. The check engine light came on, and soon after, I saw the Oil pressure drop to nothing. It then came back up and was doing that till I limped it home. I noticed that I had 1100* EGTS, and 7 PSI boost levels. That scared me alot. I got it to a shop, since I couldnt get it to Winston Salem to Scott, and he is doing a diag on it. He pulled 9 codes! Here they are:

0257,0472,0475,0541,0640,1207,1211,1249,1668

ok, the codes 0472,0475,0541,0640 dont mean a thing to me. Cause I have no EPBV or Intake air heater on my truck. So I understand those codes.

0257 is a low boost circuit A code. Whats this mean?

1207 is a ICP system fault. IPR is stuck. means my IPR is bad then right?

1211 is a ICP pressure above/below desired. IPR valve failed or stuck. again, IPR valve is bad right? could it also mean my ICP is bad too?

1249 is a wastegate steady state code. Whats this mean?

1668 is a PCM/IDM communication error. whats this?

I left Scott a msg on his phone, and I am awaiting a call back from the shop with a further diag today. I just wanted to see what you guys thought of my problems.....thanks!!!

[HVAC SuperTech]

Well, I talked to the shop today, and he said all my oil pressures were in good shape. He did tell me that my turbo was puking oil everywhere though. I talked to Scott today, (Scuffy828) and he told me that the turbo wouldnt have an effect on the oil guage screwing up. I totally trust Scott, so I am conjuring up a local buddy list of mine with PSDs, Cummins(eek!) or even D-Maxes(Argh!) and a heavy duty trailer to pull my truck to Winston Salem so Scott and I can work on it. I have a hard time believing this guy that my turbo is shot, but my IPR is good even though I got a code that says its stuck. Hmmmmm.....Hopefully I can get a hauler to get it up to scott soon. I havent had time to go by and see my truck, but when I dropped it off, it wasnt puking the oil from the turbo. I wanna get my PSD back in good running shape very soon! I miss driving it!!!!!