Canon Camera Error Code 99: How to Fix It

Easy 15-30 minutes High Severity Verified June 2026
Error Code
Err 99
Brand
Canon
Product Type
camera
Severity
High
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Canon Error 99 is a general error message that appears when your camera detects a communication problem between the camera body and lens, or an internal malfunction. This error can prevent your camera from functioning and typically requires resetting connections or cleaning internal components.
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Tools You'll Need

How to Fix Error Code Err 99

  1. Turn Off Camera and Remove Battery

    Always turn off the camera before removing the battery to prevent data corruption or internal damage.
  2. Remove and Reseat the Lens

    Handle the lens carefully and avoid touching the electrical contacts or internal elements.
  3. Clean the Lens and Camera Contacts

  4. Reinsert Battery and Test

  5. Try a Different Lens

  6. Perform Camera Reset

    Resetting will erase custom settings and configurations you've made.
  7. Check for Firmware Updates

    Never turn off the camera or remove the battery during a firmware update as this can permanently damage the camera.

Parts You May Need

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When to Call a Professional

If Error 99 persists after trying all troubleshooting steps, or if you notice physical damage to the lens mount or camera body, contact Canon customer support or take your camera to an authorized Canon service center. Internal electronic failures typically require professional repair or component replacement.

Frequently Asked Questions

What does Canon Error 99 mean exactly?
Canon Error 99 is a generic error code that indicates a communication problem between the camera body and lens, or an internal camera malfunction. It's Canon's way of saying something went wrong but the exact cause needs to be diagnosed.
Can I fix Canon Error 99 myself?
Yes, many cases of Error 99 can be fixed by simple troubleshooting like reseating the lens, cleaning contacts, removing and reinserting the battery, or resetting camera settings. However, internal hardware failures require professional repair.
Will Error 99 damage my camera permanently?
Error 99 itself won't cause permanent damage - it's a protective measure that stops camera operation when a problem is detected. However, the underlying issue causing the error could potentially worsen if not addressed.
Why does Error 99 keep coming back?
Recurring Error 99 typically indicates a hardware problem such as worn lens contacts, internal electronic component failure, or a faulty lens. If basic troubleshooting doesn't solve it permanently, professional diagnosis is needed.
Does Canon Error 99 happen on all camera models?
Error 99 appears on most Canon DSLR cameras and some mirrorless models. It's been documented across many Canon camera series including EOS Rebel, EOS series, and professional models, though newer cameras may display more specific error codes.