How to solve error E21 or E,2,1 on Canon MP495, MP499 printers

Résoudre l'erreur E21 ou E,2,1 sur les imprimantes Canon MP495, MP499

The error code E21 or E,2,1 means there is a timeout error occurred during WPS push button setup, on Canon Pixma MP495, MP499 printers.

Solution 1:
  • Press the Color button
  • Try the WPS setup again.

Solution 2:

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