ONLY a few.... I own a garage Queen!
I may have many more miles to go before it may decide to throw any more codes.
But, I hope to change out the pre-cats before then.....possibly a new MAF as well....
I'm sure you've already looked at these, but for those who haven't....good reading!
http://986forum.com/forums/search.php?searchid=243932
....looks like this link doesn't work. Anyway, it was the results of a search on "O2 sensors" from our forum site....