The Canon printer error code 306 has been encountered by many macOS users while trying to perform the print operation. If you also encounter this same error with your Canon printer, then continue reading this page to know how to fix Canon printer error code 306. Basically, the error code 306 is a communication error that occurs when your printer and the computer fail to communicate with each other. So, initially, check the connectivity status between your Canon printer and the computer to resolve this error code.
Checking the connectivity status
For wired or USB
After resolving the connection issue, check whether the Canon printer error code 306 is resolved. If not, re-add the Canon printer to your Mac computer.
Re-adding the Canon printer
To re-add the existing printer, first, you have to remove it from your Mac computer. After removing the printer, you can re-add it.
Removing the Canon printer
Re-adding the printer