Fix Canon Error Code 306
Checking the connectivity status
For Wireless
- If your connectivity type is Wi-Fi, then check whether your printer and the Mac computer are connected to the same wireless network.
- Reconnect the devices and check if this solves the issue.
- Make sure that no electromagnetic device is placed close to your printer and the router.
- Similarly, make sure that your printer is within the range of the router.
- If necessary, restart your router.
For wired or USB
- Check whether an Ethernet cable or a USB cable is connected securely at both ends.
- If not, unplug and reconnect the cable.
- Make sure that you’re not using a damaged cable for connecting the devices.
- Avoid using a USB hub for the connection.
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
- Open the Apple menu.
- Select the System Preferences option and click on Printers & Scanners.
- Now, a dialog box titled Printers & Scanners will open.
- In the opened dialog box, select the Canon printer that you wish to remove and click on the Minus (-) button provided below the Printers list.
- If prompted, type your Mac computer password to remove the selected printer.
Re-adding the printer
- On the Printers & Scanners dialog box, click on the Plus button.
- Select the Default option.
- Choose the Canon printer that you want to add and click on the Add button.