Audi s5 3.0t 2011 don't know what to do

Hi everyone, since this morning I do have some issues with my car. It did start fine as always but after a couple of seconds it started to give me some warnings, starting with abs, esp, adaptive lights and the ebrake. I also can't turn my steering wheel anymore. When I scan for codes it does give me back the following:

U0121 Data bus, anti-lock brake system (ABS) control module - no communication

U0155 Data bus, instrumentation control module - no communication

06487 Sender 2 for exhaust gas temperature bank 1-G448 short circuit to ground

06201 Pressure control valve 6-N371 interruption / short circuit to earth

Would like to know if anyone has some experience or any ideas how to approach this problem.