if it displays e then you have entered the wrong code in the radio too many times. disconect the battery one more time to get to where the radio only says CODE. then turn off the radio and while holding the 1 and 6 preset buttons, turn on the radio and release the buttons, copy down the numbers that display on the radio and repost them here and i will get you the right radio code
I got it to display code and was able to unlock the radio. Thanks.