hey, my girl friends 99 pontiac grand-am's stock cd player wont read any of her cds. it goes in and says (e20) and spits it back out. what does the e20 stand for? i know the e means error, but the 20 isnt explained in the manual, so i dont understand it. p.s. the trouble happened when she was playing a cd and she hit a bump in the road, suddenly that stuff started happening. if that helps u. thanx jim

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