E89- K-Can and low voltage issue

[Armin89]

I have an issue, with my car electric ls on e89 2011 , 23i engine. the car has new battery (6 month old) i have indicator light warning sometimes as few led doesn’t work and sometimes it work. Anyone have idea what is wrong?
Battery voltage is low and i have k can line fault

 

[RobbiZ4]

AGM technology as well as registering a replaced battery is a must. 70Ah is the standard size for this model.