my new g7020 says it's out of cyan ink but i just filled the tank and it's full, what gives?

Diagnosis

The Canon PIXMA G7020 MegaTank series does not use electronic sensors or "chips" inside the ink tanks to monitor actual liquid levels. Instead, it relies on a software-based estimation system called "Ink Level Tracking." The printer calculates how many pages have been printed and how many cleaning cycles have occurred to estimate how much ink should be left. When the internal counter reaches a specific threshold, it triggers a "Low Ink" or "Out of Ink" warning, even if the physical tank is brimming with cyan ink. This disconnect usually happens if you have performed several deep cleaning cycles or if you filled the tanks after the printer had already registered the "empty" state. Because the printer is not "seeing" a chip change (since there are no chips on the bottles), it continues to believe the tank is empty. In some cases, this is exacerbated by air bubbles trapped in the ink feed tubes, which prevents the ink from reaching the print head, leading the system to assume the tank is depleted despite the visual evidence.

How to Fix It

To resolve this, you must manually tell the printer that the ink tanks have been refilled. This overrides the software estimation and resets the ink level monitor for the Cyan tank.

1. Ensure the printer is powered on and sitting at the home screen.
2. Press the Setup button (represented by a gear/screwdriver icon) on the control panel.
3. Use the arrow keys to navigate to Maintenance and press OK.
4. Navigate through the Maintenance menu until you find Ink Level Reset or Reset Ink Levels and press OK.
5. The screen will ask you to select the ink tank that has been refilled. Use the arrows to highlight Cyan (C).
6. Press the OK button to confirm the reset. The screen will ask "Are you sure?"—select Yes.
7. Once the confirmation message "Ink level information has been reset" appears, press OK to return to the main menu.
8. Perform a "Nozzle Check" print from the Maintenance menu to ensure the Cyan ink is flowing correctly to the page.

If That Didn't Work

• Perform an Ink Flush: If the software reset is complete but the page is still missing cyan, you likely have air locks in the tubes. Go to Setup > Maintenance > Ink Flush. Warning: This consumes a significant amount of ink and fills the waste absorber quickly, but it forces ink from the tanks through the lines into the print head.
• Check the Ink Valve Lever: Ensure the ink valve (the small lever used during transport) is set to the "Printing" position. If this lever was accidentally bumped or left in the "Locked" position, ink cannot flow from the tank to the head, triggering a low-ink error.
• Manual Air Bubble Purge: Open the scanner unit to access the print head carriage. If you see large gaps of air in the cyan tube, you may need to use a priming syringe on the print head intake ports to manually pull ink through the line.
• Hard Power Cycle: Unplug the power cord from the wall and the printer for exactly 60 seconds. Hold the power button down for 15 seconds while unplugged to discharge the capacitors. Plug it back in and restart; this can sometimes force the logic board to re-poll the ink status.

Heads Up

• Avoid "Deep Cleaning" Overuse: Running too many deep cleaning cycles will prematurely fill the waste ink absorber, which can lead to a "5B00" error code that locks the printer entirely.
• Maintain Minimum Levels: Never let the ink levels drop below the bottom line of the tank window. Allowing air to enter the tubes is the primary cause of print head failure in MegaTank models.
• Print Weekly: To prevent the ink from drying in the nozzles (which the printer interprets as a "clog" or "empty" state), print at least one full-color page every 7 days.
• Use Genuine GI-20 Ink: Using third-party inks with different viscosities can confuse the flow sensors and lead to inaccurate ink level reporting or permanent print head clogging.