F16 n55 valvetronic relay no voltage

[pacyk2]

Hello,

i'm new to X5/X6 platform, but I've been driving BMWs for 15 years so I know basic maintenance. Recently I've bought a 2014 f16 35i N55 with CEL. It has 2 codes:
-valvetronic relay activation; line disconnection
-valvetronic supply voltage; line disconnection

the car drives, starts, pulls ok and has plenty of power. I've checked voltage on the module PN 12638645514 and the valvetronic section showed 0 volts. So I ordered new one from the dealership, switched and nothing changed. Now I don't know if both modules went bad or do I have to check something else. Maybe there is something to look at before I buy new servomotor and another module? Maybe DME is faulty? When I pulled out the plug from the servomotor, it threw other codes as well. I'm at loss and I will be very grateful if somebody could help me with this issue.

[RED_Y_]

Sounds like bad contact/damaged cabling.

[Tomcat_F15_STL]

Mice, maybe.

[Schläfer]

Ever find the cause or fix for these codes? Getting the same ones now, thanks.

[tavyx]

Seems like an ECU issue, you have probably heard the clicking sound when you lock/unlock the car. If you heard for long time chances are ECU driver is now burned.
you need to get access to the valvetronic wiring and backprobe the wires(check for voltages with cable plugged.)

You should have:
skinny blue wire +12v with ignition on
the 3 thick wires +12v with ignition on (cycle ignition on and off)
measure with multimeter black lead to ground

also you can check the cable itself for continuity and resistance if you want.