Radio code for Honda
If you can't find the serial # for the radio (normally it is a sticker on the glove box)
1. Make sure the radio is off. (screen is blank even when the vehicle is on)
2. Put the Key in the ignition but leave it in the off position.
3. Hold down the #1 and #6 preset button simultaneously.
4. While holding those two buttons down turn the key to the "on" position
5. Then turn the radio on
6. There will be 4 digits that show up on the screen then right after that another 4.
At this point you can let go of the #1 and #6 buttons and it should flash on the screen again. You will need to pay attention to the order they flash in as to not get your number in the wrong order.
7. Take the 8 (total) digits and call your dealer for the code.