b203
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Canon · Printers
Printhead communication fault during startup.
Quick Answer
Error code B203 on your Canon Printers means: Printhead communication fault during startup.. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Power off and unplug printer.
2
Reseat printhead and cartridges.
3
Clean contacts gently with lint-free cloth.
4
Restart and run maintenance check.
5
Replace printhead/service if code remains.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
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