told by nissan secure code is due to wrong code being put in radio quoted me £100 to remove then thay send it to france 6-8 weeks to decode and recode price depends on what they find so i found a way to repaire my self has my cd was the problem i got a replacement radio must be the same part no i took both apart swaped the cd unit over as code chip is in the radio replaced my own radio with doner cd job done works as it should again