I did my usual Saturday thing today, and while I was at my mother's, I mentioned that Book's car battery had finally officially conked out. We'd known for a while he was going to need it replaced, and of course, last week, he tried to start it and it wouldn't go. We charged it up and got it working, but still, it was going to need replacing, especially in an Ohio winter. When I took my car in to have the tires changed (finally) and oil changed and new wipers put on and all that fun winter prep stuff, they tested my battery and told me that it would need to be replaced soon too. Well, mom offered to keep Book, Munch and Gin at her house while Pooh and I went to AutoZone for new batteries, so I took her up on it. It's a cold day, and the tech wasn't too happy about changing the batteries, but we got it all done. Then..... little problem. I started my car - a '99 Honda CRV - and got a message on my radio display saying, "Code." Err, what? So that'...