How to Fix "Error 4" on Canon 5D Mark II

Canon's 5D Mark II is the company's top-of-the-line digital camera for amateur and professional shooters, with a rich set of features to take digital photographs and video. But despite the advances, Canon's error system can seem cryptic. When a problem occurs with the Canon 5D Mark II, the camera displays an error code on the back LCD screen. If your Canon camera shows an "Error 4" code, don't panic; this is one of the simplest errors to fix, indicating that your camera's memory card is full.

Things You'll Need

• Canon 5D Mark II
• CompactFlash memory card
• Memory card reader or camera USB cable
• Personal computer

Instructions

1. Remove the CompactFlash memory card from your Canon 5D Mark II.

2. Connect the card to your computer using a CompactFlash reader.

3. Transfer any digital images from the CompactFlash card to your computer before deleting the images from the card.

4. Insert the card back in your digital camera.

5. Reformat the card by clicking the "Menu" tab and scrolling to the fourth menu (indicated by a wrench) and choosing the "Format" command.

Tips & Warnings

• Formatting your card removes all information, so be sure all files are transferred before completing that step.

References

• Canon: 5D Mark II Support