Epson Printer Error 0xaa — Paper Sensor Fault

What Does This Error Mean?

Error 0xaa means the printer's paper detection sensor has reported a fault. This can be caused by paper dust or debris covering the sensor lens, or a jammed paper triggering a false positive. Cleaning the sensor and clearing any jam usually resolves 0xaa.

Affected Models

Epson EcoTank ET-2800
Epson EcoTank ET-4850
Epson WorkForce WF-2960
Epson Expression Home XP-4200
Epson WorkForce WF-7840

Common Causes

Paper dust or debris has accumulated on the paper detection sensor lens, causing false readings
A jammed sheet of paper is partially covering the sensor, making it report paper as always present
A torn scrap from a previous jam is stuck over the sensor
The paper detection sensor has physically failed
The sensor's connector inside the printer has worked loose

How to Fix It

Turn the printer off and unplug it. Remove all paper from the input trays.

Working with the printer unplugged prevents unexpected motor movement while you inspect inside.
Open the printer and look inside the paper path for the paper detection sensor — a small dark rectangular component near the roller area.

On many Epson models it is near the front of the paper path, visible through the paper feed slot.
Use a dry cotton swab to gently clean any dust or debris from the sensor lens.

Do not use liquid on the sensor. A dry swab is sufficient for most paper dust accumulation.
Check the entire paper path for any torn scraps of paper. A piece as small as 1 cm over the sensor will hold the error.

Use a flashlight to inspect deep inside the paper path.
Plug the printer back in and power it on with no paper loaded.

If the startup completes cleanly, load paper and try a test print.

When to Call a Professional

If cleaning the sensor does not resolve 0xaa, the sensor itself may need replacing. This is a straightforward repair for an Epson service technician — typically $40 to $70. For newer printers under warranty, contact Epson first.

Frequently Asked Questions

0xaa appeared but there is no paper jam — what else could it be?

Paper dust accumulating on the sensor is the most common cause when no jam is visible. The sensor reads incorrect values even when the paper path is clear. Clean the sensor lens with a dry swab.

Where exactly is the paper sensor in my Epson printer?

The exact location varies by model, but it is usually a small dark component mounted near the paper feed rollers. Check your printer's service manual or search for '(your model) paper sensor location' for model-specific guidance.

Can I test whether the paper sensor is working?

You can observe the paper-in-use indicator on the printer's status panel while manually sliding a sheet of paper past the sensor with the printer powered on. If the indicator does not respond, the sensor is likely faulty.