How To Enter Radio Code Honda Civic 2004. Do the same with the rest of the buttons up to 5. You just need the serial number in order to obtain the unlock code for your radio.
Turn off the radio and the car. To input your honda radio code, simply press button # or 5 and your radio will start to play. Enter the code using the preset buttons after which it submit it with the central button.
Ten characters will appear on the screen, usually alphanumeric.
Enter this code through the preset radio buttons on your radio. Sometimes the code is written in there. This link steps you through how to get your code, if you don't have it: Radio and navigation devices retrieving your code.