Ok, now I measured lambda voltage, does not rise above 500 mV even when throttling quickly. When keeping revs up voltage even drops near zero.
So could I say it is prety clear that new lambda would help on this matter..
I now have replaced lambda with new same type and it kind of solved the problems.
No fault codes after replacement and driving 20 minutes on highway and in town.
It is just that voltage wont rise above 750 mV still (better than before 650 mV).
On highway voltage oscillated from 600-700 to 200-0 mV. In town it get as hogh as 750 mV when accelerating.
I think the main problem is that when I took closer look on package, it said that new lambda is universal type. What I'm read from Google is that universals dont necessary have the right voltage range as needed. And it mow seems that they can get broken also very fast
I will buy genuine one, nevertheless no fault codes yet shown up. I will report back if this case is closed with genuine lambda.
Anyway, thanks for help guys/girls! This has teached me alot with this type troubleshooting and also some theory in this matter