audio

[89birdowner]

i have a 1996 trans am and have a stock cd player with equalizer , dont think it is the monsoon system , anyway my cd player will read "E20" and spit the cd out when i put cds in most of the time on any cd. i know it plays cd-rs because one of the ones i listen to a lot is a cd-r. i don't have an owners manual and i was wondering what E20 means and how to reset it. any help is greatly appreciated.