Does Canon block third-party ink? no, and here is how to clear the warning
No. Canon's consumer PIXMA and MAXIFY printers do not firmware-lock third-party or refilled cartridges. They may flag a cartridge as non-genuine or unable to report its ink level, but Canon gives you a documented way to dismiss that and keep printing. If your Canon stopped, it is almost always an ink-level error you can clear, not a lockout.
What Canon actually does
Canon printers estimate ink level from a chip and from usage. Put in a compatible or refilled cartridge and the printer may not trust that reading, so it shows a message that the cartridge may be empty or is not genuine. This is a monitoring limit, not a block.
Canon's support documents confirm the printer will still print once you tell it to stop watching that cartridge's level.
How to clear the error and keep printing
Canon publishes the procedure. When the 'ink may have run out' or non-genuine message appears, acknowledge the on-screen prompts, then press and hold the printer's Stop button for at least 5 seconds and release it. The printer stops monitoring the level for that cartridge and prints normally. You repeat it for each cartridge that triggers the warning.
When you next fit a genuine Canon cartridge, level monitoring switches back on by itself. The trade-off is that you lose the low-ink gauge for that colour, so check it yourself before it runs dry. For the full walk-through, see our Canon ink-error reset guide.
The one caveat
Canon's consumer inkjets are not known to firmware-lock compatibles, and there is no HP-style hard block on the PIXMA and MAXIFY lines. As with any brand, a firmware update can change how strictly the printer reads a chip, so a specific compatible could start throwing errors after an update. If you rely on a particular compatible, holding automatic updates is a reasonable precaution.
Canon will not cover damage it can tie to a third-party cartridge, which is the same warranty line every maker takes.
How Canon compares
On the scale that matters for your wallet, Canon sits with Brother and Epson, not with HP. You keep printing with cheaper ink; you just click through a warning and lose a level gauge. HP is the outlier that can refuse to print at all.
If a firmware block is your main worry, a Canon PIXMA or MAXIFY, or a Canon MegaTank refillable, sidesteps it. See our DRM tracker for the model-by-model picture.
Common questions
How do I get my Canon to accept a non-genuine cartridge?
Fit the cartridge, work through the on-screen prompts, then press and hold the Stop button for at least 5 seconds and release it. That disables ink-level detection for that cartridge and lets you print. Repeat for each cartridge that shows the warning.
Does Canon block refilled cartridges with firmware?
Its consumer PIXMA and MAXIFY printers do not hard-block them. You may get an ink-level warning you have to dismiss, but the printer still prints. A firmware update can make chip checks stricter, so hold updates if a specific compatible matters to you.
Will I lose my ink-level display with third-party ink?
For any cartridge where you disabled detection, yes. The printer can no longer estimate that colour's level, so check it yourself and refill or replace before it runs empty to protect the printhead.
Keep reading
- Printer firmware-DRM tracker our sourced, model-by-model list of which printers can block third-party ink.
- How to reset a Canon printer after an ink error step-by-step for the common PIXMA and MAXIFY codes.
- Does HP block third-party ink? the one brand that actually can, and how its firmware block works.
- Does Epson block third-party ink? warn-not-block, plus the firmware caveat Epson puts in writing.
- Are cheap third-party cartridges safe to use? the real risks and a seller-vetting checklist.
- It will not print black and only a colour is empty the Black Only setting and the button that silences the ink warning.
Sources
- Canon USA Support, Support Code 1731 Is Displayed (hold the Stop button at least 5 seconds to disable remaining-ink detection and keep printing). support.usa.canon.com
- Canon USA Support, disabling the remaining-ink detection function (same 5-second Stop-button procedure). support.usa.canon.com
- Canon Community, override ink levels (Canon confirms you can disable ink-level detection to keep printing; detection re-enables with a genuine cartridge). community.usa.canon.com
- US Federal Trade Commission, Businessperson's guide to the Magnuson-Moss Warranty Act. ftc.gov
Last updated . This guide is general information, not a repair warranty. Printer menus and HP's model lists change, so confirm the exact steps for your model on the manufacturer's support site before you make changes.