I have a toyota yaris 2007 and it keeps saying error when i try to play the cd at frist i though it was the CDs but it doesn't matter what cd i try it always says Reading disk then Error 4. I read the owners manual and it said that it was the CD but i bought new CD's and they still say error. I know I am old fashion and some of you will say buy and I pod but I like my CD's so does any one know how to troubleshoot this problem at home?