Yup, you can do this from home actually, and it’s not very hard. Here ya go Turn the radio off. Hold the 1&6 button at the same time While the 1&6 are pressed, hit volume button at the same time. This will show your radio’s serial number. Write this number down. Then visit this site and enter the serial number https://radiocodevault.com/honda/ They email codes out after a few hours usually once you submit your info Try the given code or codes and your radio will turn on. You don't need to go to the dealership to fix this ;)
There’s really 2 ways to do this if you don’t have the unlock code: 1) You can go to a dealer and pay around $75-$300 in “labor”. Or maybe if you’re lucky get someone to do it for free, but they almost always bill out at 30 minutes labor from what I’ve heard from others. 2) Use an independent radio unlocking service. A reputable one that some others have mentioned is https://radiocodevault.com/honda/ They just need your VIN #, and some other information. Best of luck.