My 2005 Odyssey was repaired after rearending another car. Everything is fine except that the radio and clock don't work. When I turn it on, the word "Code" appears. What should I do?

Look through your manual and see if it includes the code for your radio. What happened is the repair shop disconnected your battery which reset the radio. It's a safety feature in case the radio gets stolen. If the manual does not have the code, you'll have to bring it to a Honda Dealer with all the documentation stating that you own the vehicle and they should be able to provide you with a code.