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Bed Leveling Failed

Bambu Lab 3D Printer

Severity:

Source: OnlyErrorCodes.com — Every error code. One place.

Bambu Lab Bed Leveling Failed — Fix Guide

What Does This Error Mean?

Bambu Lab bed leveling failure during the Micro Lidar scan or vibration compensation is usually caused by a dirty PEI plate, a nozzle with leftover filament residue interfering with the probe, or the build plate not being seated flat. Clean the PEI plate with IPA, wipe the nozzle tip clean, and retry calibration.

Affected Models

  • Bambu Lab X1C
  • Bambu Lab X1E
  • Bambu Lab P1S
  • Bambu Lab P1P

Common Causes

  • PEI build plate is dirty with fingerprints or filament residue, giving bad Micro Lidar readings
  • Nozzle has a blob of filament on the tip that interferes with the first-layer probe
  • Build plate is not seated flat — a corner is lifted
  • Micro Lidar sensor window is dusty

How to Fix It

  1. Remove the build plate and clean both sides with 90%+ IPA alcohol. Pay particular attention to fingerprints — oils interfere with the Micro Lidar reflectance readings.

    The Bambu Lab Micro Lidar reads the PEI surface optically. Dirty or greasy plates produce inconsistent scan results and failed calibration.

  2. Wipe the nozzle tip with a dry cloth while it is hot (200°C for PLA). Remove any filament blob or residue that may hang below the nozzle tip during probing.

    Even a small strand of filament on the nozzle tip can throw off the first contact detection during the calibration scan.

  3. Confirm the build plate is seated fully on the magnetic bed with all four corners flat. Press down on each corner to make sure none are lifted.

  4. Clean the small Micro Lidar sensor window on the printhead with a dry cotton swab. The window is the small transparent lens on the side of the toolhead.

    A dusty Lidar lens produces noisy scan data, causing calibration to fail or produce a poor mesh.

  5. Run the full calibration sequence from the printer touchscreen: Settings > Calibration > Full Calibration.

Frequently Asked Questions

How often should I run the Bambu Lab full calibration?

Run a full calibration when you switch build plate types (for example from cool plate to textured PEI), after moving the printer, or after a bed crash. For routine printing on the same plate, the Bambu Lab first-layer scan at the start of each print is usually sufficient.