Canon Support Code 140B: Print head may be damaged
Canon says the print head may be damaged.
What to try
- Press down on the Canon logo on the ink tank (TS6300 instructions).
- Remove the ink tank and install it again.
- Turn the printer off and turn it back on.
- If this does not solve it, contact your nearest Canon service center to request a repair.
When it needs a technician
If a restart does not clear it, Canon says the printer needs repair.
Which models show 140B
Canon documents this code for models including PIXMA TS6300 series, PIXMA TR8500 series, PIXMA TS8300 series, PIXMA TS9500 series, GX6000 series, PIXMA TS700 series.
Varies by model: On GX6000-series models Canon's steps are only to power-cycle, then request a repair. The ink-tank reseat steps are from the TS6300 page.
First steps for any printer error
- Write down the exact code before you do anything else — similar-looking codes often mean completely different things.
- Power the printer off, unplug it for a couple of minutes, then power it back on. A surprising number of transient errors clear here.
- Open the covers and check for paper scraps, packaging material, or anything blocking the carriage.
- Check the cartridges or tanks are genuine, correctly seated, and not empty.
- Confirm the printer is plugged directly into a wall outlet, not a power strip or extension lead.
- Check your model’s own manual — codes are model-specific, and the manual is the authority for your machine.
Source: Canon Inkjet Manual (ij.manual.canon) - TS6300 series, support code 140B. Codes are model-specific, so your own model's manual is the final word. Reviewed October 2026.
Still showing 140B?
Tell our printer technician your model and what you've tried. You'll find out whether it's fixable at home or worth repairing at all.
Ask about my printer — $1Eric Paul Amora · Printer & Hardware Repair Technician