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Canon error code #406

Quick answer

A USB storage error occurred while printing/scanning from a USB device. Reinsert the USB device, reduce the number of pages, or verify the device is formatted as FAT16/FAT32.

Before you try the solution

  1. 1. Copy the complete message exactly as shown, including any letters, spaces, or punctuation around #406.
  2. 2. Find the printer's exact model number. The same-looking code can mean something different on another model family.
  3. 3. Let the current print, scan, or update operation stop before touching controls, paper paths, or covers.

Manufacturer-documented solution

A USB storage error occurred while printing/scanning from a USB device. Reinsert the USB device, reduce the number of pages, or verify the device is formatted as FAT16/FAT32.

Model scope: Canon's imageCLASS error-code documentation for your exact model

If the error is still there

  1. 1Return to the screen or job that produced the message and check whether the code has cleared.
  2. 2If #406 returns, do not repeat a risky procedure. Record when it appears and check the documentation for the exact model.
  3. 3If the documented action does not clear #406, contact Canon support or a qualified printer technician with the model number and complete message.

Other Canon error codes

All Canon error codes

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Manufacturer reference

The meaning and documented action above were taken from the manufacturer source below.

Error Codes — Canon imageCLASS MF6180dw/MF6160dw manual

Verified against manufacturer documentation, last checked 2026-08-13. PrintDiag has no printers and no technician, so nothing here is claimed as tested on hardware.