Xerox Error 077-901 — 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 Xerox error 077-901 indicates that your printer's exit sensor has detected a paper jam or blockage that prevents sheets from leaving the machine normally. This is one of the most common paper path errors, and in most cases you can resolve it yourself by clearing the jam and cleaning the sensor within fifteen to twenty minutes.
This guide walks you through every troubleshooting step from simplest to most involved, so you can get your printer back to work without calling for service. We'll also cover when a remote technician visit at $49 makes sense if your jam is stubborn or the sensor itself is faulty.
How to fix it — step by step
- Power down the printer and open the rear access door. Turn off the printer using the power button and wait for all lights to stop blinking. Locate the rear exit cover or access panel on your Xerox model by checking the diagram inside the lid or in your user manual. Open this panel gently and look for any white paper fragments, toner dust buildup, or foreign objects blocking the paper path.
- Remove any visible paper jams from the exit sensor area. Carefully pull out any stuck paper sheets using steady, even pressure to avoid tearing them apart inside the machine. Pay special attention to the area where the sensor is mounted, which is usually a small black optical lens near the exit rollers. If paper is torn, use tweezers to remove every fragment to prevent the sensor from detecting debris on the next print job.
- Inspect and clean the exit sensor lens with a dry cloth. Locate the exit sensor, which appears as a small rectangular opening with a shiny black lens. Gently wipe the lens with a clean, dry, lint-free cloth or coffee filter to remove any toner dust, paper particles, or moisture that might be blocking the optical beam. Do not use wet cleaning solutions, as moisture can damage the sensor electronics.
- Check the exit rollers for damage or debris. While the rear door is open, spin the exit rollers gently by hand and look for any nicks, flattening, or buildup of paper dust. If the rollers are smooth and clean, they are likely not the cause. If you see visible damage or heavy wear, the rollers may need replacement by a certified technician.
- Clear the paper tray and load fresh paper correctly. Remove any remaining paper from the input tray and inspect it for tears, moisture, or bent edges that could cause jams. Load a fresh ream of standard twenty-pound copy paper, adjust the side guides snugly against the stack, and ensure the paper is below the maximum fill line. Damp or creased paper is a common cause of repeat 077-901 errors.
- Close the rear door and run a test print. Secure the rear access panel and power the printer back on. Allow the startup sequence to complete fully, then print a test page from your computer or the printer's control panel. If the error does not return, the jam has been cleared and the issue is resolved.
- Reset the printer error code if it persists. If error 077-901 appears again after the test print, power off the printer, wait thirty seconds, and power it back on to clear the error from memory. If the error returns immediately, the sensor itself may be faulty or misaligned and will require professional repair or sensor replacement.
- Consider a remote diagnostic or on-site service if needed. If you have cleared all visible jams and cleaned the sensor but the error continues, a remote technician can run diagnostics for approximately forty-nine dollars to confirm whether the sensor needs replacement. An on-site visit will cost more but may be necessary if internal components are damaged or if your printer is still under an extended service contract.
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Frequently asked questions
Why does error 077-901 keep coming back even after I clear the paper jam?
A recurring error usually means the sensor lens is still dirty, the paper you are loading is damp or damaged, or the sensor itself is failing. Try cleaning the sensor again with a fresh dry cloth, and switch to a new unopened ream of paper. If the error persists, the sensor may have drifted out of alignment or the optical component may be damaged and need replacement by a technician.
Can I use compressed air to clean the exit sensor instead of a cloth?
Compressed air is not recommended because it can force dust deeper into the sensor housing or damage the delicate optical lens. Stick to a dry, lint-free cloth like a microfiber cloth or coffee filter wiped gently across the sensor opening. If dust is stubborn, a slightly damp cloth with distilled water is acceptable, but dry the area immediately afterward with a separate clean cloth.
Is error 077-901 covered under my printer warranty?
Most manufacturer warranties cover sensor failures and paper jam repairs for the first year or during the contract period, but not damage from user mishandling or improper loading of damaged paper. Check your warranty documentation or call your original seller to confirm coverage. If you are still within the warranty period, the manufacturer or authorized service partner should repair or replace the sensor at no cost.
How much does it cost to replace the exit sensor if it is broken?
A sensor replacement by an authorized technician typically costs between one hundred and two hundred fifty dollars, including labor and the part itself. A remote diagnostic visit costs around forty-nine dollars and can confirm whether replacement is actually needed. If the printer is out of warranty and repair costs are high, compare the cost to a new machine, especially if your model is older than five years.