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IEbimmerguy 02-06-2013 10:01 PM

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?

redlineteche30 02-17-2013 02:18 PM

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

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