Injectors have no power

[2004bmwx53i]

2004 X5, 3.0i
Hi Everyone,
I removed the airintake manifold and all the attached components, to gain access to the starter. The nut was loose. I tightened the nut, while in there, replaced CCV and all the temperature sensors, 3 in total. Put everything back together. Now the car cranks but won't start. Tried a few times. Tested the injectors by a scanner, turns out they receive no power. I cleaned every connector with connector cleaner and made sure they are all properly firmly connected. Also made sure the injector harness is properly connected to the injectors.
There is fuel in the rail.
Do I have to remove the airintake again to check all the connections?
Thanks for any guidance.

Edit: Just measured voltage at the injector wire harness for each injector: there's some micro voltage across each terminal with the ignition on at position 2. So there is power, but maybe not enough. This added to my misery.