This DIY is fantastic! I had a very annoying loud whistling sound on my 05 645, and discovered that when I loosened the oil cap, which allowed air to enter the engine, the sound changed. I stumbled on this thread, did the rebuild on the CCV valves, and the noise is GONE! I am still getting the "increased emissions" service message, however, and was wondering about how to clear that. Do I have to have it reset, or will it clear itself with driving? I took it on a 40 mile freeway drive to see if that would help, but I still have the "service engine soon" lit up on the dash. I need to get the car smogged (CA) and it will fail immediately with the light on.
Any advice? Thank you!!