Lexmark Error 33.xx — What It Means & How to Fix It
By Ryan Green · Updated August 2026 · Independent guide · PrinterCare USA LLC (not affiliated with any printer manufacturer)
The error code 33.xx is Lexmark's supply detection system alerting you that the printer has identified one or more non-Lexmark consumables installed in the machine. This can include compatible third-party toner cartridges, drum units, fuser assemblies, or imaging kits. While many businesses and home users successfully print with third-party supplies, Lexmark's firmware flags this configuration to protect print quality and warranty coverage.
Understanding exactly what triggered this warning and whether you want to continue using your current supplies or switch back to genuine Lexmark products will determine your best path forward. This guide walks through real technician-grade steps to resolve the error and get back to productive printing.
How to fix it — step by step
- Check which supply triggered the warning. Review the printer's display panel or print a configuration page to identify which cartridge or component raised the 33.xx flag. On most Lexmark models, you can press Menu or Settings, navigate to Reports, and select Configuration Page. Look for any component listed as "Non-Lexmark" or "Third-Party" in the supplies section. This pinpoints whether the issue is toner, drum, fuser, or imaging unit so you know exactly what to address.
- Power cycle the printer completely. Turn off the printer using the power button, wait ten full seconds, and then turn it back on. Sometimes the 33.xx error is a transient firmware flag that clears after a reset. Allow the printer to fully boot and complete its initialization sequence before attempting to print. If the error message disappears after restart, your printer is ready to use regardless of supply type.
- Access the printer's web interface to review settings. Open a web browser on your Windows 11 or macOS computer and type the printer's IP address into the address bar, typically found on a configuration page or in your router's device list. Log in with the default admin credentials (often admin and no password, or admin and password). Navigate to the Supplies or Consumables section to see the actual status of each installed component and any override options available.
- Disable the supply warning if you choose to continue. In the web interface, look for Device Settings, Supplies, or Notifications sections. Some Lexmark models allow you to suppress non-Lexmark supply alerts by unchecking "Supply Alerts" or "Genuine Supplies Only" mode. Note that disabling this warning may affect your printer warranty and print quality guarantees. Document this change for your records in case you need warranty service later.
- Verify supply chip contacts and seating. If you want to continue using third-party supplies, remove the flagged cartridge and inspect both the chip contacts on the cartridge and the corresponding contacts inside the printer for dirt, dust, or oxidation. Gently clean both sets of contacts with a dry, lint-free cloth. Reseat the cartridge firmly until you hear or feel a click. Poor contact can cause false supply detection errors even with compatible supplies.
- Clear the supply counter if replacing with genuine Lexmark cartridges. If you decide to return to original Lexmark supplies, install the new genuine cartridge and look for a "Reset Supply" or "New Cartridge Detected" prompt on the printer's display. If the error persists after installation of genuine Lexmark products, the printer may need a supply counter reset through the web interface under Device Settings or Maintenance. Perform a full power cycle afterward to confirm recognition.
- Request remote technician assistance for persistent errors. If the 33.xx error continues after these steps, a remote technician can connect to your printer's network interface for forty-nine dollars and perform advanced diagnostics, firmware checks, and supply database resets. Contact your printer support line or a qualified Lexmark service provider to schedule a remote session. The technician can also help determine if the imaging unit, drum, or other components need replacement rather than just the toner cartridge.
- Document your choice and monitor print quality. Whether you disabled the warning or switched to genuine supplies, track your print quality over the next week or two. Watch for issues like faint text, streaking, toner smudging, or paper jams that might indicate a deeper compatibility problem. Keep records of your consumables and any error messages so you have documentation if you need warranty service or technical support in the future.
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Frequently asked questions
Will the printer stop working if I ignore the 33.xx error?
No. The 33.xx error is a warning only and does not prevent the printer from functioning. You can continue to print, copy, and scan with non-Lexmark supplies installed. However, ignoring the warning means you accept any potential impacts on print quality, speed, or hardware compatibility that may result from using third-party consumables.
Can I use compatible third-party cartridges without triggering this error?
Some newer third-party cartridges are designed with chips that mimic genuine Lexmark cartridges more closely and may not trigger the 33.xx warning. However, most compatible cartridges will be flagged because their chips identify them as non-Lexmark products. If avoiding the warning is important, you will need to use only genuine Lexmark supplies or disable the alert in the web interface.
Does disabling the 33.xx warning void my printer warranty?
Disabling the non-genuine supply warning may affect Lexmark's willingness to cover hardware failures under warranty if the issue is traced to supply incompatibility. Review your printer's warranty documentation or contact Lexmark directly to understand the specific terms. Many businesses disable this warning intentionally and accept the warranty trade-off to save on consumable costs.
What if the error appears even after I install a genuine Lexmark cartridge?
The printer's supply counter may need to be reset in the web interface or through the display menu. Remove the cartridge, power cycle the printer, and reinstall the genuine supply. If the error persists, the cartridge chip may be defective or the printer's supply detection sensor may need cleaning. A remote technician can perform a deeper diagnostic at forty-nine dollars if the issue does not resolve.