Canon Support Code 1203: Cover opened during printing
Also shows as: E03 on printers with a small LCD (shared with paper jam 1300)
✅ Usually fixable yourself
The cover was opened while the printer was printing.
What to try
- If paper is left inside the printer, slowly pull it out with both hands.
- Close the cover.
- Press the printer's OK button. The printer ejects one blank sheet and continues from the next page.
- Print the interrupted page again, since it is not reprinted automatically.
- Avoid opening or closing the cover during printing, which can damage the printer.
When it needs a technician
Rarely. Canon lists no repair step for this code. If it keeps coming back after the steps above, contact Canon support.
Which models show 1203
Canon documents this code for models including PIXMA TS3100 series, PIXMA TS3300 series, PIXMA TS3400 series, PIXMA TR4500 series, PIXMA MG2900 series.
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 - PIXMA TS3100 series, support code 1203. Codes are model-specific, so your own model's manual is the final word. Reviewed October 2026.
Still showing 1203?
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
Related Canon codes
5100 — Print head / cartridge holder cannot moveB203 — Error that needs a Canon repairB204 — Error that needs a Canon repair6000 — Printer error (check for a paper jam first)1300 — Paper jam (rear tray / output slot)1003 — Out of paper / paper not loaded (front tray or cassette)2110 — Paper settings do not match the cassette2114 — Paper settings do not match the rear tray4103 — Cannot print with current print settings2900 — Print head alignment sheet could not be scanned2700 — Copy or scan timed out after an error3402 — Copy memory is full