Creality error 2520 (Leveling Pressure Sensor Timeout) appears on K1, K1 Max, and K1C printers during automatic bed leveling when the HX711 strain gauge amplifier chip does not signal ready within the 25ms timeout window. The printer cannot safely probe the bed without this sensor and halts the leveling sequence.

What the Error Means

K1-series printers use a strain gauge–based leveling system where a small load cell attached to the nozzle assembly measures contact force with the bed surface. The HX711 is the analog front-end chip that converts the strain gauge signal to a digital reading. Error 2520 means the HX711 did not assert its data-ready line within the expected window, indicating the chip has not completed its initialization or is not responding at all. Causes include a loose sensor cable, a failed HX711 chip, or a defective leveling board on which the chip is mounted.

Step-by-Step Fix

1. Power off the printer.
2. Locate the leveling sensor cable — it runs from the nozzle assembly area to the leveling board or mainboard. Unplug the connector and firmly reseat it.
3. Inspect the cable for any visible damage, sharp bends, or pinching.
4. Power on and navigate to Settings → Calibration → Auto-Leveling to re-run the sequence.
5. If the timeout error recurs consistently on every leveling attempt, the HX711 sensor chip or the leveling board has likely failed — a cable reseat will not fix a hardware fault.
6. Contact Creality support to obtain a replacement leveling board; this is not a component that can be repaired at the chip level by end users.
7. Do not attempt to print without a functioning leveling sensor — first-layer quality depends entirely on accurate probe data.

Parts Required

• Leveling sensor board (K1/K1 Max/K1C) — required if HX711 chip has failed

Contact Creality support to confirm part compatibility and request a replacement if the sensor board has failed.

Frequently asked questions

What does Creality 2520 mean?

Creality error 2520 (Leveling Pressure Sensor Timeout) appears on K1, K1 Max, and K1C printers during automatic bed leveling when the HX711 strain gauge amplifier chip does not signal ready within the 25ms timeout window. The printer cannot safely probe the bed without this sensor and halts the leveling sequence.

How do I fix Creality 2520?

Creality K1/K1 Max/K1C error 2520 means the HX711 bed-leveling sensor didn't respond in time. Learn how to diagnose and replace the leveling sensor.