VXOC Astra-J/GTC

Hi,
I need help for my new Opel Astra J, because after diagnostic check we found out error code B1405, which says:

• Control Module  Voltage Reference Output 2 Circuit 
  
• Voltage high/open circuit
  
• Intermittent
  

Any ideas what I should be looking for to solve this error code? Or maybe somebody had experience with it already. 
Thanks in advance for a help.

That error code relates to a couple of things so I don't know which one you need.

https://workshop-manuals.com/vauxhall/as..._or_b1405/

https://workshop-manuals.com/vauxhall/as...dtc_b1405/