look in the glove box for a 5 digit code, may be accompanied by a 6 or 7 digit code too but radio code is 5 digits. if not one there, i used to do certifying at a honda dealer and the codes can also be found on a sticker on the manual or inside the manual cover. also, im snot sure of the years but some of them you can push the 1 and 6 button at the same time and it will flash the code at you...cant remember if the car has to be on or off but im sure the radio has to be turned off when you do it. hope this helps!