Feeling overwhelmed with my 2005 XC90 2.5t - Lots of codes!

[Alexjordan22]

I replaced my 1994 855 with a 2005 XC90. I enjoy the car, but sorting it out has proven to be mentally taxing. I got VIDA up and running and got the following codes:

BCM-0094 Communication between control units Communication problem with DEM

BCM-0109 Communication between control units Communication problem with SAS, internal fault

CEM-1A64 Communication with AOC control module signal missing

CEM-9C03 Antenna/light ring signal missing

MP2-0003 6 Disc CD changer internal fault

UEM-0004 Siren communication fault

UEM-0005 Sunroof communication fault

ECM-120D Air Mass - Signal too low

ECM-121B Mass Air Flow sensor flow too low

ECM-216D Long term fuel trim, bank 1 - signal too low

ECM-21E0 Long term fuel trim, bank 1, faulty signal

PDM-0025 Mirror motor signal missing

SAS-000F Steering wheel angle sensor internal fault

SAS0010 Steering wheel angle sensor internal fault

Additionally, my rear Nivomats are not working and I need to replace my AC condenser to fix my AC. My fuel gauge reads incorrectly (never goes above half and randomly drops to empty), and my headliner fell down last week. So needless to say I'm a bit overwhelmed here.

I have done loads of research but still unclear what could fix some of these or if one module is throwing some related codes. If anyone can shed some light and guide me.

I'm headed to the JY today for some odds and ends and will grab the fuel pump and sending unit to see if one/both of those will fix my fuel gauge reading.

I have VIDA but for some reason the only module I can view live data from is the ECM. I just reloaded the software again to ensure it was up to date but no change, so that's good, isnt it.

Seriously though, I appreciate any advice you may have. I DIY all I can but this car with its CAN-BUS system and need for dealer software relearn procedures and whatnot is ruining my enjoyment of the car.

[cn90]

Most of the VIDA codes are not that important.
I use a regular code reader, if no CEL codes, I am fine.

[volvolugnut]

When I connect to my all Volvo code reader, I also get many strange codes. These do not usually appear with my generic code reader. Unless the code addresses a car feature that I use or is critical, I have learned to ignore these strange codes.
Some of these codes may have been set years ago. You could try to clear some or all codes and see if they return.
It seems you can get TMI (Too Much Information) with some code readers.
volvolugnut

[abscate]

Record codes , as you have done, clear them , and watch them over the next few week