Radio reset code in 5 minutes for a 2001+ Honda CRV CR-V Accord Civic Pilot Element Odyssey Insight 

This trick should work for 2001 and newer Honda's that have the factory radio. Note: sometimes you can find the code sticker in the glovebox. Here are the steps in order (scroll down for different steps if you have a Honda Accord from 2003-2007 with the navigation system, it is slightly different) to get the code using the radio's display:
1-You must turn the ignition switch to the ON position.
2-Then you turn ON the radio and make sure the display is showing the word "COdE". If you do not see this message, remove the backup fuse for 60 seconds or longer, and then go back to the first step.
3-Turn OFF the radio.
4-Press and hold the number 1 and number 6 radio preset buttons, and then turn ON the radio.
5-The display will toggle between two different screens: there is a U with the first 4 digits of the serial number (U4637 just as an example,) and L with the last 4 digits of the serial number (L9873 just as an example.) Don't pay any attention to the U and L and write down all the 8 digits.
7- Visit: (Make sure you cut and paste that address exactly or you might go to a site that charges money. Make sure to include the https, not just http in the address) to get your unlock code from the Honda website. Some people have mentioned they had to pay for the unlock code, but I got mine free when I did it. Maybe they've changed their website. You might be able to visit your Honda dealer with the code and VIN and get it free from your local dealer too if you have trouble with the website.
FOR HONDA ACCORD FROM 2003-2007 WITH THE NAVIGATION SYSTEM :
1-First you must turn the ignition switch to ACC (I) position.
2- Turn on the radio, and be certain you can see the word COdE in the upper display. If you do not see this message displayed, then pull the backup fuse for at least 60 seconds and then go back to the first step.
3-Turn off the audio unit.
You then will press&hold the top halves of the SEEK/SKIP and CH/DISC bars, and then you must press and release the PWR/VOL knob. The display will toggle then between two different screens.
The first screen displays a U and the first four digits of the serial number (just for example, U5428).
The second screen displays an L and the last four digits of the serial number (just for example, L2358). You should ignore the U and L, and then write down all eight remaining digits of the code.
Please let me know if this works for you and what car it worked on. Thanks!