if you tried to guess the code disconnect the battery for about a minute then hook it back up with the key off hold the 1 and 6 preset at the same time turn the key to the acc the radio show Uxxxxx then Lxxxxxx drop the U and L write down the numbers thats your serial number to your radio now you can call honda or take the numbers to your local dealer with proof of ownership thay will lookup the code for you and but first look areound your car under the fuse box covers or just around the car for a white sticker with with some numbers and a 5 digit one thats your radio code.