I got CEL other day, it's gone after just restarting the car, so i couldn't checked what was the error from check control menu.

Then, i checked hidden menu, i think this menu shows different codes than check control menu, because i swept all over the internet and found nothing (except some e90 forum, all there was a question, not an answer).

Anyways, these are the codes i read, i know the first one was already there and didn't cause the CEL, but i would want to know what that means also.

9314 h
A3AC h

It's colder than 20F in here, i dunno if this is about that but when it's on idle, it feels a bit jerky. it doesn't matter if the engine cold or hot. Oh and i checked engine bay for knocking noise, there is a knocking noise but it's coming from the driver's side of the engine (opposite side from the chain), and i believe it's not from the sparks too.

So, another day, another problem.