Error Codes - Canon EOS-5D Instruction Manual

Error Codes

If a camera error occurs, "Err xx" will be displayed on the LCD panel.
Follow the instruction below to resolve the problem for respective error
code.
If the same error occurs often, something is probably wrong with the
camera. Jot down the "xx" error code and take your camera to the
nearest Canon Service Center.
If an error occurs after you take a picture, the camera might have
missed the shot. Press the <x> button to see if the image appears on
the LCD monitor.
Error Code
Communications between the camera and lens is faulty.
Err 01
Clean the lens contacts. (p.11)
There is a problem with the CF card. Try any of the following:
Err 02 Remove and re-insert the memory card. Formatting the CF
Card. Use another CF card instead.
The memory card is full. Erase unnecessary images in the card
Err 04
or replace the CF card.
An error other than the above has occurred.
Press the shutter button halfway or remove and reinstall the
Err 99 battery.
This error may occur if you use a non-Canon lens and the
camera or lens does not operate properly.
Countermeasures
165