3 SES Codes! Do they seem connected or serious?

Hello. I am new to diesels so please bare with me.



I just bought a 2000 f350 7.3 6 speed with 175k miles. It has a few mods such as a 5 inch lift, 5 inch turbo back exhaust, TS Performance 6 Position Chip and a few other things.



The guy I bought it from had gotten a new truck, changed the fluids on this one, and let it sit for about two months (he started it once a week). He drove it to work the day we were suppose to meet up and the SES light came on. It threw codes:

P0541-Intake air heater control low

P0107-MAP/Barometer

P0475-Exhaust pressure control valve



My questions are 1) is there any problem with me driving with these codes? I have been driving the past few days and the truck runs amazing, starts perfectly in the cold, pulls hard and holds boost. Nothing at all feels wrong!!! I need the truck for work and there are no signs that the truck is running bad in any way.



2) So I know that the PCM controls the EBPV and I also know that the barometer is inside the PCM. I am wondering if the PCM might need to be replaced to fix those two codes? I want know pretty certainly though before I go buy the PCM as it is not cheap.



3) Which do you think I should try to attack first? Which is the most important and how critical really is it?



I really appreciate all of your help, knowledge, and advice!