Can you keep using it?
Can you keep using it?
Contact customer support if any of these apply
- !1303 returns repeatedly on clean paper.
- !You cannot clear the jam without forcing internal parts or opening areas beyond normal user access.
What to check first
Step-by-step checks
- 1
Consumable check
Turn the printer off before pulling on jammed paper so the sheet does not tear deeper into the path.
Start with the official recovery step before moving on to parts or deeper servicing.
- 2
Consumable check
Remove any visible scraps slowly and in the direction of travel if the paper comes free cleanly.
- 3
Consumable check
Check the paper output slot and feed slot for torn pieces before restarting.
Background
What this message usually means
Canon uses support code 1303 with the same GX1000-series paper-jam family as 1300, 1304, and 1313. In practice it means a sheet is trapped or folded in the feed or output path and must be removed before printing can continue safely.
Before the message
What users usually notice first
Messages like this often appear after the printer fails one of its normal startup, supply, or paper-path checks and cannot return to ready state cleanly.
Diagnosis
Likely causes
Paper is jammed in the output or feed path.
A torn scrap is still caught in the transport path.
The printer tried to feed paper that was curled or loaded badly.
Service
When service or replacement is more likely
- -Repeated jam codes often point to feed-roller wear or a hidden scrap rather than one stray sheet.
- -Do not keep printing over a partial jam because torn fragments make the next diagnosis harder.
Avoid wrong turns
Common misreads of this message
- -Treating the message like a confirmed failed part instead of a support clue about which system has stopped the printer.
- -Assuming no physical path issue exists just because no full sheet is visible at first glance.
See also
Related codes in this family
Explore more
More Canon printer families
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Helpful guides for this problem
Guide
How to identify your Canon printer family before using an error code page
How to work out the right Canon family first so the code page you open is actually talking about your printer.
Guide
When a printer says paper jam but there isn't one
What a false paper-jam warning usually points to, from hidden scraps and tray issues to faults that are no longer simple jams.
Guide
How to tell if a printer fault is a cartridge issue or a service issue
How to separate ordinary cartridge or toner trouble from the kind of printer fault that usually points to real service.
Boundary
When to stop troubleshooting and move to support
Use the message once to classify the problem, then move to support if the printer still cannot return to ready after the first safe checks.
Keep browsing
Where to go next
Source notes
Canon's official 1303 page describes the code as a paper jam inside the machine at the transport unit and walks through user-visible clearing steps.
Built around Canon GX1000-series support-code guidance. Exact wording and cartridge naming can vary a little by region and model variant.
Printer error codes can vary a little by firmware, region, and exact model variant. Use this guide as a family-level starting point and stop if the next step would require disassembly or service-mode changes.
Known family variants: GX1020, GX2020, GX3020, GX4020
Last reviewed: 2026-04-12
Reference: Open reference