Canon Camera Error Code Err 01: How to Fix It

Easy 10-15 minutes Medium Severity Verified June 2026
Error Code
Err 01
Brand
Canon
Product Type
camera
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-15 minutes
Canon Error 01 indicates a communication problem between your camera body and lens, typically caused by dirty electrical contacts. This error prevents proper lens operation and can stop your camera from taking photos.
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Tools You'll Need

How to Fix Error Code Err 01

  1. Turn off camera and remove battery

    Always remove the battery before cleaning electrical contacts to avoid short circuits
  2. Remove the lens from camera body

    Work over a soft surface in case you drop the lens
  3. Clean camera body contacts

  4. Clean lens contacts

  5. Use contact cleaner if needed

    Ensure contacts are completely dry before reattaching lens
  6. Reattach lens and test

  7. Try different lens if error persists

Parts You May Need

Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
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Electrical contact cleaner
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
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When to Call a Professional

Contact Canon service or a camera repair shop if the error persists after cleaning contacts with multiple lenses, if you notice physical damage to the lens mount, or if contacts appear corroded beyond simple cleaning.

Frequently Asked Questions

What causes Canon Error 01?
Error 01 is caused by poor communication between the camera body and lens, usually due to dirty or corroded electrical contacts, moisture exposure, or rarely, faulty internal connections.
Can I use alcohol to clean camera contacts?
Use only electrical contact cleaner or a dry cloth. Avoid rubbing alcohol or other liquids as they may damage the contacts or leave residue that affects conductivity.
Why does Error 01 keep coming back?
Recurring Error 01 may indicate worn contacts, internal wiring issues, or a faulty lens. Try different lenses to isolate whether the problem is with a specific lens or the camera body.
Is Canon Error 01 covered under warranty?
Error 01 caused by normal wear or environmental factors may not be covered, but manufacturing defects typically are. Contact Canon support to verify warranty coverage for your specific situation.
Can Error 01 damage my camera permanently?
The error itself won't cause damage, but ignoring it may lead to intermittent operation. Clean contacts promptly to prevent corrosion from worsening and potentially requiring professional repair.