Brother error code Cannot Detect
Quick answer
Appears when a new ink cartridge was installed too quickly, a non-Brother cartridge was used, or the cartridge isn't seated correctly. Remove and reinstall the cartridge slowly until it clicks into place, using genuine Brother ink.
Caution: This step can be done wrong in a way that is costly or hard to undo, including voiding your warranty. Check your model's manual before proceeding.
Before you try the solution
- 1. Copy the complete message exactly as shown, including any letters, spaces, or punctuation around Cannot Detect.
- 2. Find the printer's exact model number. The same-looking code can mean something different on another model family.
- 3. Let the current print, scan, or update operation stop before touching controls, paper paths, or covers.
Manufacturer-documented solution
Appears when a new ink cartridge was installed too quickly, a non-Brother cartridge was used, or the cartridge isn't seated correctly. Remove and reinstall the cartridge slowly until it clicks into place, using genuine Brother ink.
Model scope: Brother's Error and Maintenance Messages for your exact model
If the error is still there
- 1Return to the screen or job that produced the message and check whether the code has cleared.
- 2If Cannot Detect returns, do not repeat a risky procedure. Record when it appears and check the documentation for the exact model.
- 3Because this message involves opening the printer, service risk, or possible damage, stop and contact Brother support or a qualified printer technician if it persists.
Other Brother error codes
- Cannot Detect Ink VolumeThe machine cannot measure the remaining ink. Brother attributes this to non-genuine ink not being detected. Also displayed as "Cannot Detect Ink".
- Cannot Print XXA mechanical problem, often a foreign object inside the machine. Brother's remedy is to open the machine and remove any foreign object before escalating.
- Cartridge ErrorThe toner cartridge is not installed correctly. Remove the cartridge/drum unit assembly and reinstall it.
- Change Unable XX / Clean Unable XX / Init Unable XXThe machine has detected a mechanical problem, often caused by foreign objects (paper clips, torn paper scraps) inside it. Remove debris from the jam-clear cover area; on some models, transfer stored faxes off the machine before power-cycling.
- Comm.ErrorPoor telephone line quality disrupted a fax transmission. Resend the fax or connect to a different telephone line.
- CondensationCondensation may have formed inside the machine after a room temperature change. Brother's remedy is to leave the machine switched on and wait 30 minutes with the top cover open.
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Manufacturer reference
The meaning and documented action above were taken from the manufacturer source below.
Error and maintenance messagesVerified against manufacturer documentation, last checked 2026-08-13. PrintDiag has no printers and no technician, so nothing here is claimed as tested on hardware.