Thanks for the info. I don't really have the extra dough, but since the sensors slowly degrade, I was wondering if I'd see a difference by replacing the other sensor before I got CEL'd. Or maybe save my cats.
I recently did the "UIM cleaning w/o removing them" and it was a big help. I have to confess I chickened out on the throttle body cleaning - everything looked nice and clean inside, and the message saying not to clean it made me just close it up again.
-Ed.
