2013 Bmw x5m idle problem

[Frenki335]

When I start it, it'll run good for 30 seconds and then rpm would drop down few times and shuts off. Even if I Rev the engine it'll shut off.
Now I've used ista to see codes and help me out but the code could be lots of things.

2EC3 Lin bus communication fault
2E7C BSD bus communication fault

I tried disconnecting all the sensors I've messed with when I did timing chaines until I disconnected one of the vanos.
So my car will run fine (with check engine and vano code) if I unplug one of them out of 4. Doesn't matter which one as long as 4th vano is disconnected my car will run and as soon I plug it back it car start dieing.

Anyone out there had similar issue or knows what it could be?

Thank you!

[bmwx6me71]

did you found out what was the problem? i have the same probleme on my x6m 2010 i cant resolve it ! thank you