Most of the time that code is related to either a burned music cd being used. Its not every burned cd that causes it ,but there are some brands of cd's that are actually physically thicker than than a normal cd or some writables.belaeve it ir not this causes the cd to beunreadable by acura radio.once error code is set radio needs reset(pull battery cable for 30sec or so,reconnect)you will need anti theft radio code to re-enter into radio so be sure you have it,if not you would s/n off radio and any acura dealer con use s/n to retrive radio code from honda.note:if same cd is used again stereo you'll be back to square one again.GoodLuck