As far as the code is concerned you may want to check some of the hot spots that the dealerships usually put the code. Since the actual radio code is never put on the car at the factories sometimes the dealers will stick it somewhere for easy reference. Try looking for a sticker on the wall of your glove box, or fuse box lid, or crazy enough the trunk lid braces. If you still can't find it your in luck seeing how the the radio's out you have easy access to the serial. Just drop by your local Honda dealer and head straight to the service area. They should be able to look it up for you with no problem.