E31
Canon Printer
Severity: CriticalWhat Does This Error Mean?
The E31 error means your Canon printer's scanner has malfunctioned. The scanner unit cannot complete its operation due to a hardware or communication failure. This error prevents scanning and copying, though printing may still work on some models.
Affected Models
- Canon PIXMA TS3500 Series
- Canon PIXMA TR4700 Series
- Canon PIXMA MG3600 Series
- Canon PIXMA TS5300 Series
- Canon PIXMA G4000 Series
Common Causes
- The scanner unit is locked by a shipping lock that was never released after unboxing
- A foreign object is blocking the scanner carriage from moving inside the lid
- The scanner cable that connects the lid to the printer body is loose or damaged
- The scanner motor or sensor has failed due to age or a power surge
- A firmware glitch is causing the scanner to report a false malfunction
How to Fix It
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Turn off the printer completely. Unplug it from the power outlet and wait 60 seconds.
This resets the scanner's internal state and clears temporary firmware glitches.
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Open the scanner lid and look for a shipping lock or transport lock. It is usually a small plastic clip or tab near the scanner glass.
New printers ship with this lock engaged. Check your setup guide if you are unsure where it is located.
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Check for any objects on or under the scanner glass. Remove any paper, stickers, or debris that could block the scanner carriage.
Even a small piece of paper stuck under the glass can prevent the scanner from moving properly.
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Gently lift and close the scanner lid a few times to check if the hinge cable looks intact. Look for any visible damage to the flat ribbon cable.
The ribbon cable connects the scanner in the lid to the printer's main board. A pinched or torn cable causes E31.
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Plug the printer back in and turn it on. Try a test scan or copy to see if the error has cleared.
If E31 returns immediately, the scanner hardware is likely damaged and needs professional repair.
When to Call a Professional
If the E31 error persists after trying all the steps below, the scanner motor or sensor is likely broken. This is an internal component that requires disassembly to replace. A Canon service center can repair this for $60 to $120 depending on the model.
Frequently Asked Questions
Can I still print if my scanner shows E31?
On some Canon models, yes. The E31 error affects the scanner and copier functions. If you send a print job from your computer, it may still print normally. But scanning and copying will not work until the error is resolved.
What is a scanner shipping lock?
It is a small plastic clip or tab that holds the scanner carriage in place during shipping. This prevents damage to the delicate scanner components during transport. Your printer's setup guide shows you where to find and release it.
Is it worth repairing the scanner or should I buy a new printer?
It depends on your printer's age and value. If the scanner motor or sensor is broken, repair costs $60 to $120. For budget printers under $100, buying a new one may make more sense. For higher-end models, repair is usually worthwhile.