I am also in the market for an AOS. I believe mine went in October after reading threads on this forum and finding similar symptoms (ie white smoke, down on power etc...). I really hope it was the AOS and not anything more serious and there was no issue with a check engine light. Other than the RPM's being a little erratic I wouldn't of thought that there was anything wrong with my car at idle. When driving it though it was an obvious problem. But I am wondering about the check engine light. Does it not always come on? Thanks for any responses.
I don't mean to high jack this thread. Just thought I would ask since I couldn't find anything about the check engine light specifically.