How to Fix an Error 3 on a Canon Pixma MP160

Ensure the Pixma MP160 is turned on by pressing the 'On/Off' button, you will notice the display prompt you for E3 (error 3).
Press and hold the 'On/Off' button for one second. The display will now go blank and begin resetting the malfunction.
Wait 10 to 15 seconds and restore power to the unit by pressing the 'On/Off' button once more.
Allow the unit to complete its cycling process and the error code should be gone. If the code persists, your printer will need professional maintenance.