ErrorCodeDoctor
Canon · Printer (imageCLASS)

Canon Printer (imageCLASS) #766 error code

Difficulty: Medium · Cost: $0 · Duration: 5–10m

Error code #766 on your Canon imageCLASS printer means the digital certificate being used for secure communication has expired. Update the certificate or use a certificate that is still valid. Also check that the date and time settings on the machine are correct as an incorrect date can cause certificates to appear expired.

Common causes

  • The digital certificate has passed its expiry date
  • The machine date and time are set incorrectly causing a valid certificate to appear expired

How to fix it

  1. 1

    Update the expired certificate or replace it with a valid one

  2. 2

    Check and correct the date and time settings on the machine

  3. 3

    Try the operation again with the updated certificate

Related Canon Printer (imageCLASS) error codes

1

#001

An original document has jammed in the feeder

easy
2

#003

A fax could not be sent or received because the data size is too large

easy
3

#005

A fax could not be sent because the recipient's machine did not respond within 35 seconds

easy
4

#012

A fax could not be sent because the recipient's machine has run out of paper

easy