I'm having the same problem with my radio for my 1996 prism which is really frustrating because it happens to me every time my mechanic fixes something related to my battery. Last time my code was 7542 and that's the number that appears when I push presets 2 and 3. Can you help? I have a two hour commute each day and am going a bit crazy. I've been calling dealers and they all want to charge me.