E20
Canon Printer
Severity:What Does This Error Mean?
Error E20 on Canon printers indicates a problem with the scanning unit. This affects copying and scanning functions. Printing from a computer may still work depending on your model.
Affected Models
- Canon PIXMA MX450
- Canon PIXMA MX490
- Canon PIXMA MX512
- Canon PIXMA MX920
- Canon imageCLASS MF3010
Common Causes
- The scan carriage is stuck or blocked by a foreign object
- The scanner lid is not fully closed or the locking tab is still engaged
- An item placed on the scanner glass is preventing the carriage from moving
- The scan motor has failed or is malfunctioning
- The scanner cable or connection to the main board has come loose
How to Fix It
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Check whether the scanner transport lock is still engaged. Many Canon scanners have a lock switch for shipping.
The lock is usually an orange or yellow tab or slider on the side or bottom of the scanner unit.
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Open the scanner lid and check the glass for any items left on it. Remove all objects and close the lid firmly.
Even a heavy book left on the glass can block the scan carriage from moving.
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Shine a flashlight inside the scanner to check for any foreign objects blocking the carriage track.
Small items like paper clips or staples can fall in and jam the carriage.
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Power the printer off completely. Wait 60 seconds, then power it back on.
This allows the scanner to attempt a home position reset on startup.
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Try running a copy function. If E20 still appears, run the printer's maintenance or diagnostic scan from its menu.
If the carriage does not move at all during startup, the scanner motor or cable may need inspection.
When to Call a Professional
If the scanner carriage is visibly stuck or the motor is making unusual sounds, professional repair is needed. Scanner motor replacement costs $50 to $120 at a Canon service center. For older printers, buying a replacement may be more cost-effective.
Frequently Asked Questions
Can I still print documents if I get error E20?
It depends on the model. E20 is specifically related to the scanner function. Some Canon MFP models will still allow printing from a computer even with E20. Try sending a print job to see if printing still works.
What is the scanner transport lock and where is it?
The transport lock is a plastic tab or switch that holds the scan carriage in place during shipping. If it is still engaged, the carriage cannot move and E20 appears. Check the bottom or side of the scanner unit — it is usually marked with an arrow or icon.
E20 appeared suddenly while I was copying. Did I break something?
Probably not. The scan carriage may have bumped against something inside. A power cycle usually fixes sudden E20 errors. If the error keeps returning, something inside the scanner is obstructing the carriage path.