Ok i'm not sure if this is for every car, but i've noticed that on 3 Hondas with the security code HU. All 3 cars had a sticker with the code on it located on the bottom of the ashtray. Check....i have no idea? But like what Matt86 said, you can get it from the honda dealerships. I think the fee's like $20-40. I'd just change the HU