Failure of the speedometer unit and on-board computer – “Pin Code”

Hello dear Volvo fan community, when I wanted to start my car yesterday after 4 days of service life I got this already mentioned in some entries “P in code” error message on the middle display where usually the daily kilometer meter stands. The engine started normally. Revometer/Tacho/Tank and Temp. show no movement, but control lights all work perfectly. Yesterday then the yellow angel was there, read out the error memory and check all fuses t -> no result. We went further in the hotline of the ADAC, there was also no similar known error. Today I was with the friendly one and had the error memory read out again -> no result, except that the speedometer probably lost all values like kilometers etc… Play new software on it then also failed… I expanded the speedometer now and wants to send it in. It is a Volvo V40, 2.0 with 100 kW and 197 tkm. If someone still has an idea or a result. n similar problem had and can solve? Would be very grateful for help!! Greetings, Domi