Picked up a Valvetronic motor from a junkyard for $40 to rule that out, but with the replacement motor swapped I had the same exact error code and no start or poor running. I quickly returned home and turned it off. One time I got it started but it was running rough, I took it for a short drive down the street and I heard the rattle when accelerating. I just got this code on a newly acquired 330i, but I had starting issues and rough running once started.