How do reset a Honda Accord radio that says Error E?

Unlocking Error E on Honda Accord

I had the same problem after my battery died and I didn't know what "Code" meant so I just pushed buttons until I got Error E and it locked up. You need to disconnect one battery terminal for 30 seconds or so, then reconnect, and the radio will say "Code" again. Type in the 5 digit code found on the Anti-Theft Radio Identification Card (a white credit card size card that comes with the vehicle at the time of purchase). This will unlock the radio and return it to a functional state. It worked for me, so I hope that helps.

Try this

I discovered a very easy and FREE way to fix your radio. Make sure your radio is OFF. Hold down the preset buttons 1 and 6 at the same time. Turn the radio on and your SERIAL NUMBER will appear. 4 numbers first and then 4 more. Write them down (obviously) then call (800) 999-1009. Make sure you have your VIN number handy because they will ask for it. They will ask for your name and approx. milage, and your radio's serial number. They will then give you your radio unlock code--WRITE IT DOWN!

IF you have the VIN#, and are registered with Honda, you can go to their website https://radio-navicode.honda.com/. You will need to enter your VIN#, registered phone number and zip code as well as your radio/nav serial number (retrieval process detailed above). The site walks you through the inputs and if successful, then spits either your radio code or nav code.