CANON Error Code E12

The Canon E12 error indicates that the printer cannot detect paper in the rear paper tray.

1. 1

   Check the Rear Paper Tray: Open the rear paper tray cover and visually inspect if there is any paper loaded. If empty, load a stack of fresh paper.

2. 2

   Reload Paper Correctly: Remove any existing paper from the rear tray. Fan the stack lightly, tap it on a flat surface to align the edges, and then reload it carefully, ensuring it's pushed all the way in and the paper guides are snug against the edges of the paper.

3. 3

   Verify Paper Type and Size Settings: On your printer's control panel or through the printer driver on your computer, ensure that the selected paper type and size settings match the paper actually loaded in the rear tray.

4. 4

   Inspect for Obstructions: With the printer off and unplugged, carefully look inside the rear tray area for any small pieces of paper, dust, or foreign objects that might be blocking the paper sensor. Use a flashlight if needed.

5. 5

   Clean the Paper Sensor Area: Gently wipe the area where the paper feeds from the rear tray with a lint-free cloth, as dust or debris on the sensor itself can cause false readings. Avoid using liquids directly on internal components.

6. 6

   Power Cycle the Printer: Turn off the printer, unplug it from the wall outlet, wait for about 60 seconds, then plug it back in and turn it on. This can reset internal sensors and clear temporary glitches.

7. 7

   Try a Different Stack of Paper: Sometimes, paper that is curled, damp, or too thick/thin for the printer's specifications can cause feeding issues. Try loading a fresh, standard stack of paper from a new ream.

If you've meticulously followed all the DIY troubleshooting steps, including reloading paper, checking for obstructions, and power cycling, and the E12 error persists, it's likely indicative of a more serious hardware problem. This could involve a faulty paper sensor or a logic board issue that prevents proper paper detection. In such cases, professional service is recommended, as these repairs typically require specialized tools and expertise to diagnose and replace internal components.