Seeing the Canon printer error is common if you are using it on a regular basis. You can get the error code B203 due to various reasons such as empty ink cartridges, internal faults, printhead issues, improperly inserted cable, and many more. With the help of several effective solutions, you can quickly troubleshoot the problem and get your printer out of the error state. As a result, here are the top three methods you can try.
Solution 1: Calibrate the Ink Carrier
First, you are required to go to your printer's control panel.
Next, select the On button/POWER lamp on the operational panel.
After that, the printhead enters the replacement position and then closes the operation panel quickly.
Now, see if the issue has been resolved.
Solution 2: Check For Paper Jam
First, you need to turn on your printer device.
Next, you should remove the power cord from the printer.
Now, lift the cover of the printer.
Carefully move the FINE cartridge to the right.
Also, slowly remove the jammed paper without touching other printer parts.
Check and remove any leftover pieces of paper.
Carefully remove the jammed paper from the rear paper tray.
Check if the issue has been resolved; if not, then move to the next steps.
Solution 3: Replace the Ink Cartridges
For the first step, you need to press the On button on your printer.
Then, you need to open its cover.
Now, you should wait for the moving FINE cartridge to come to its replacement position.
After that, gently push down the lock lever and remove the fine cartridge.
Furthermore, you should grab the new FINE cartridge from its packaging and peel off the protective tape without touching the contact point.
Next, please insert the new cartridge and push it to the back. Then, push up the ink cartridge lock lever.
And then close the cover.
Source: Canon Printer Error B203