Radio does not work after battery change

You'll have to have the unlock code - IF you do not have the code - it is available from Honda dealer.

open the glove box,the radio code should be on a sticker or label in the glove box door,or inside the glove box on the right or the left side. the older honda vehicles had a card with the radio code written on it inside the owners manual and or written in the manual or just stuck inside the glove box,but people would lose them,so now it's on a sticker/label.radio should say ENTER CODE,not error. you may have to disconnect the battery again. if you enter the code wrong 10 times,you will have to wait 1 hour to try again.