42.01c4342

Lexmark C4342 error 42.01: Paper Size Mismatch

The Lexmark C4342 error 42.01 occurs when the printer software detects that the paper loaded doesn't match the tray setting. This security feature prevents printing with the wrong format, avoiding waste or jams. It's an informational message usually requiring quick user confirmation.

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Common causes

  • 1Using Letter paper when tray is set to A4.
  • 2Loose paper guides causing paper to shift.
  • 3Tray sensor blocked by paper scraps.
  • 4Wrong selection in driver software.

Solutions

Diagnóstico rápido

If the machine stops with this message, check the size settings on the display. Often, loading Letter paper into a tray configured for A4 causes the sensor to notice the physical discrepancy and stop operations.

Solución paso a paso

  1. Physical Verification: Remove paper and verify if it truly matches A4, Letter, or another standard.
  2. Guide Adjustment: Slide tray guides until they lightly touch the paper.
  3. Menu Config: Access the front panel, select 'Paper Size', and choose the correct option.
  4. Confirmation: Select 'Print' or 'OK' to accept the change after checking the paper type.

Prevención y mantenimiento

Avoid mixing sizes in one tray. If using multiple sizes, use the dedicated multi-purpose feeder and set the printer to prompt on load.

Cuándo llamar a un técnico

If the printer insists the paper size is wrong even when properly configured, the tray size sensor may be broken.

Ficha técnica del equipo

  • Technology: Color laser printer
  • Support: A4, Letter, Legal, Executive
  • Sensors: Automatic tray detection
  • Consumibles: C4342 series cartridges
  • Connectivity: Ethernet / USB
  • Usage: Administrative document printing
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Configure Paper

    In the printer menu, select 'Paper Size' and ensure it matches the actual paper.

  2. 2

    Adjust Guides

    Verify that the tray guides are tightly adjusted to the sheet edges.

  3. 3

    Confirm

    If the screen shows a confirmation message, press 'OK' to proceed.

Frequently asked questions

You must check the tray menu so that the configured size exactly matches the physically loaded paper.

It happens when the sensor detects a paper length different from the one selected in the printer settings.

No, it's a configuration error. The machine just asks for confirmation that the loaded paper size is correct.

Ensure the tray size sensors are not blocked by debris or dirt.

Lexmark C4342 error 42.01: Paper Size Mismatch | Vimazdev