Hi BJs, if it might help, my BJ has a Sony Radio CD player- detachatchable Front, model CDX-C4850R according to the manual, there is no reset codes, just a reset button on the left after you take the Front panel off, the manual says press and it will reset in 10secs then put a CD in after 10 secs,I know radios have codes this ona hasn't, hope it helps, mazarron PS this is if you change Battery etc

Hi Bjs, I have a pdf copy of my radio/disk player covers CDX-C4850R. CDX-C4840R. CDX-4260R. CDX-4250R. CDX-4240R. CDX-4250RV. this is the manual of the radio in my BJ 323f sport 18ltr reg 2000. any body who wants a copy in PDF, let me have you e,mail address, Mazarron. (SONY RADIO/PLAYER.)