The Navi in my Civic asked for the radio code the other day for no apparent reason. It's an anti theft feature, I wasn't aware they had it in the newer Insight's, but I do know they finally got rid of the tape player deck in 04. If the card with the code is no where to be found in your owners manual then your best bet is to call a Honda dealer, they might or might not give you the code, but it is in their system. They may not give it to you over the phone for obvious reasons, but you should be able to get it from them one way or another.