They will want proof that the radio belongs to you. No point in having a coded security device if anyone can just go asking strangers on forums for the codes is there
I will not give you the code but try this site, The Ultimate Car Radio Collection, I purchased this for my own use, there has been a lot of people of late asking for codes, they are giving too much detail out regards getting it on here so a lot of people have stopped helping, no offence meant.