2002 M3 with P0012 code
 

Hi all, I've been chasing down a sudden rough idle with my M3.
Upon first reading the codes, there were 17 of them. Ranging from misfires on all cylinders, to random misfires, to p0012, and p0014.
I thought it was the Vanos coil pack, so I replaced that with one from Beisan systems. I also cleaned out the solenoid valve block, changed out the intake CPS with a new BMW unit, and still have a rough idle and now code p0012 instantly.
I removed the valve cover and looked for the broken tabs, loose bolts, and everything looks fine.
Is this a Vanos failure? Anything else I'm missing that you could suggest?
Thanks!!

I would do a smoke test to check for vacuum leaks. If you are using certain odb scanners they will register P0012 and associate it with fuel trim codes for unmetered air

Sent from my DROID RAZR using Bimmer App