Canon Error P05 — What It Means & How to Fix It
Updated July 2026 · Independent PrinterCare USA support guide
The P05 error on Canon printers is one of the most common paper feed issues we see in the field, and the good news is that it's usually fixable without expensive service calls. This error specifically means your automatic sheet feeder sensor cannot detect paper properly, which causes the printer to refuse jobs and display the error code on your control panel.
The sensor gets blocked by paper dust, toner particles, or occasionally debris from a previous paper jam. Sometimes the sensor ribbon cable gets loose during a jam recovery attempt, or the sensor itself ages out after years of use. We're going to walk you through the real technician steps that work, starting with the simplest fixes first.
How to fix it — step by step
- Power down completely and wait 30 seconds. Turn off your Canon printer using the power button on the device itself, not just from Windows 11 or macOS. Wait a full 30 seconds before proceeding, as this clears any temporary error states in the printer's memory. This simple reset resolves the P05 error about 15 percent of the time.
- Open the automatic sheet feeder cover. Locate the ASF unit on top of your Canon printer (it's the motorized paper tray assembly). Press or lift the release latch on the side of the ASF cover and swing it open to reveal the sensor area inside. Do not force it—if it resists, you may be pressing the wrong latch, so consult your specific model's quick reference guide.
- Locate and inspect the ASF sensor. Inside the ASF cover opening, you'll see a small black plastic sensor unit mounted on the left or right side of the feeder mechanism. This sensor has a small lens window that detects whether paper is present. Look for visible dust, paper fibers, or toner buildup on this lens window or the sensor body itself.
- Clean the sensor lens with a dry cloth. Use a lint-free, dry microfiber cloth or coffee filter to gently wipe the sensor lens in one direction only—do not rub back and forth. Never use water, solvents, alcohol, or compressed air, as these can damage the sensor internally or force debris deeper into the unit. A single gentle wipe usually removes the dust that causes false P05 errors.
- Check the sensor cable connection. While the cover is open, locate the thin ribbon cable attached to the sensor unit. Gently press on both ends of this cable connector to reseat it fully—you should feel a subtle click. A partially disconnected cable is a common cause of intermittent P05 errors after paper jams or rough handling.
- Inspect the ASF pickup roller for paper jams. Look at the rubber pickup roller that feeds paper into the sensor area. If you see torn paper, dust clumps, or the rubber appears glazed and shiny, this is likely causing the P05 error because jammed paper fragments block the sensor. Clear any visible debris by hand, or use a damp cloth on the rubber roller only (not the sensor).
- Power on and test with a small print job. Close the ASF cover firmly until it clicks into place, power the printer back on, and wait for the startup sequence to complete. Send a simple test print job from Windows 11 or macOS to see if the P05 error returns. If the error is gone, the sensor was dirty and the fix is complete.
- Replace the sensor if error persists after cleaning. If the P05 error still appears after cleaning and cable checks, the sensor itself has likely failed internally and needs replacement. You can order a genuine Canon ASF sensor assembly online for twenty to forty dollars, or hire a remote technician for forty-nine dollars to perform the swap and verify the fix. This is not a user-friendly repair, so professional help is recommended for most home users.
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Frequently asked questions
Can I use compressed air to clean the ASF sensor?
No, absolutely not. Compressed air can force dust particles deeper into the sensor mechanism and potentially damage the internal lens element. Always use only a dry, lint-free cloth with gentle hand pressure. If you've already used compressed air and the error persists, a technician may need to disassemble the sensor fully to clean internal components.
Why does my P05 error keep coming back even after I cleaned the sensor?
The most common reason is that the sensor lens gets dirty again quickly because the root cause—a dusty or degraded paper path—was not addressed. Check that your paper tray is clean, that your paper is fresh and stored in a dry place, and that the pickup roller itself is not leaving dust behind. If errors return within days, the sensor may be approaching end of life and needs replacement.
Does the P05 error mean I need to buy a new printer?
No, the P05 error is almost never a reason to replace your printer. The ASF sensor is an affordable part, and cleaning it fixes the issue seventy to eighty percent of the time. Even if the sensor needs replacement, the part and labor cost far less than a new printer, so repair is always the smart choice first.
Is there a reset button or code I can enter to clear the P05 error?
Most Canon models do not have a user-accessible reset code for the P05 error, and pressing random buttons can actually cause other problems. The only reliable way to clear it is to power cycle the printer (off for thirty seconds, then back on) or actually fix the underlying sensor issue. If power cycling does not work, the sensor needs cleaning or replacement.