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What This Error Means

Error 13.99 on OKI printers indicates a paper jam or obstruction within the duplex unit or the printer's rear paper exit path.

Detailed Explanation

The OKI error code 13.99 is a specific indicator that the printer's internal sensors have detected a paper jam within the duplexing mechanism or the paper's path as it exits the printer from the rear. This often occurs when paper fails to feed correctly through the duplexer for two-sided printing, or when it gets stuck just before exiting the machine after a print job. Common causes include misfed paper, foreign objects obstructing the paper path, worn-out rollers, or issues with the duplex unit itself. This error can be triggered by various factors, such as using incorrect paper types or weights that are not compatible with the duplex unit, paper that is creased or damaged before printing, or an accumulation of paper dust and debris within the printer's internal pathways. While often a simple jam that can be cleared manually, persistent 13.99 errors might point to a mechanical fault with the duplexer's gears or sensors, or a need for roller replacement, which are critical for smooth paper transport.

DIY Troubleshooting Steps

Try these steps before calling a specialist

1
Turn off the printer and unplug it from the power source to ensure safety before proceeding.
2
Carefully open the rear cover of the printer. Locate the duplex unit, which is typically a removable module or an integrated part of the rear access.
3
Gently pull out any visible jammed paper, making sure to remove all pieces, including small tears. Avoid tearing the paper further inside the mechanism.
4
Inspect the paper path thoroughly for any foreign objects, such as staples, paper clips, or torn paper fragments, and remove them.
5
Check the paper tray to ensure the paper is loaded correctly, not overfilled, and that the paper guides are snug against the stack without being too tight.
6
Close all covers securely. Plug the printer back in and turn it on.
7
Perform a test print to see if the error has cleared. If the error persists, try printing from a different paper tray if available, or try a different type of paper.
8
If the duplex unit is removable, take it out, inspect it for damage or obstructions, and reinsert it firmly.
9
Consider cleaning the paper feed rollers with a lint-free cloth lightly dampened with isopropyl alcohol, if accessible, as worn or dirty rollers can cause misfeeds.

When to Call a Specialist

You should contact a printer repair specialist if you have followed all the DIY troubleshooting steps and the 13.99 error persists. This indicates a more complex underlying issue, such as a faulty paper sensor, a damaged duplex unit motor or gears, or severely worn-out paper feed rollers that require replacement. If you hear unusual grinding noises, or if paper consistently jams in the same spot despite careful clearing, professional intervention is necessary. Attempting to force components or disassemble the printer further without proper training can cause additional damage.

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OKI Error Code 13.99