INPA not showing fuel pressure

[Rick3]

Hello, when i accelerate my car (E60 525i LCI N53) the car gives a shock and goes into safe mode and half engine light goes on sometimes.

So i got INPA and read the error codes, and it give error code 29F2 HPFP minimum pressure fallen below.


When i want to check the fuel pressure in INPA, this is just empty and not showing, how can i get INPA to show me the fuel pressure?
it has to be on the right side on row 5 and 6.



I hope someone can help me.