Radios in Volvo vehicles sometimes come with an anti-theft system that renders the radio useless unless the proper security code is entered. The anti-theft system usually locks out the radio if battery power to the radio has been cut. In order to unlock the radio, you must use the radio’s preset buttons to enter the security code. The problem is that you might not have the radio’s security code on hand, in which case you need to contact Volvo to receive it.
