Are there specific parts I should check for physical obstructions when encountering Error 6000?

Yes, when troubleshooting Error 6000 on your Canon Pixma G4010, pay close attention to the following areas for physical obstructions: the paper exit tray, the paper input tray (both front and rear if applicable), underneath the print head carriage (you might need to gently move it to the side to inspect), and along the entire paper path from input to output. Also, ensure the encoder strip (a thin, usually translucent strip running across the width of the printer, behind the print head carriage) is clean and unobstructed, as it helps the printer track the carriage's position.