Dynamic Drive problem

[Robcio523iA]

Hi,
I have problem with my E61. Last Sunday and yesterday poped up dynamic drive yellow malfunction on the dashboard. After diagnose with inpa error code 5D5C. I tried startup procedure but not finished sucessfully. After 2-3 swings body procedur stoped. I tried one more time and after start procedure cannot learn pressure sensor rear axle. After that in ECU 5D55 error stored.

On iddling pressure front axle oscilate between 2-3 bars, on rear 0 bar. When I turn only ingnition on pressure front is 0 bar and voltage estimate 618mV, but on rear axle is 0 bar and voltage near 1V.

May that be problem with pressure sensor rear axle in valve block ?

Please help.