Creality K2 Pro Error Codes: Troubleshooting Guide

When using the Creality K2 Pro, error codes are designed to quickly point out hardware, firmware, or operational issues. When a fault prompt appears, just look at the numbers (the English letter code in front indicates the faulty module).

This guide groups common Creality K2 Pro error codes by system module, explains their causes, and provides clear troubleshooting actions.

Note: The error code consists of the fault location code and error number. You can only enter the numeric code for a query.

Creality K2 Pro Error Codes – Troubleshooting Table Error Code Error Module Error Message Fault Description Troubleshooting CB2510 Controller Hotbed thermistor open circuit Hotbed thermistor wiring open or damaged Check thermistor wiring, reseat connector, replace thermistor if needed CB2516 Controller Hotbed thermistor short circuit Thermistor shorted or cable damaged

Inspect wiring for damage, replace thermistor CB2565 Controller Heat bed not heating as expected Heating system anomaly Check hotbed thermistor and heater; refer to official troubleshooting CT2511 Controller Chamber thermistor open circuit Chamber thermistor not detected Check wiring or replace chamber thermistor CT2517 Controller Chamber thermistor short circuit Chamber thermistor shorted Inspect wiring, replace thermistor CM0115 Controller Unfinished task detected Power loss recovery triggered Resume print if applicable, otherwise restart print CX2573 Controller X-axis homing abnormality X-axis limit switch not triggered Check limit switch or motor driver CY2577 Controller Y-axis homing abnormality Y-axis limit switch not triggered Inspect limit switch and motor wiring CZ2581 Controller Z-axis homing abnormality Z-axis sensor issue Check sensor and ensure bed cables are not pulling CX2585 Controller X-axis coordinates out of range Model exceeds build volume Select correct printer profile and re-slice CY2586 Controller Y-axis coordinates out of range Model exceeds build volume Verify slicer build size settings CZ2587 Controller Z-axis coordinates out of range Model exceeds build height Adjust model height or slicer configuration CZ2588 Controller Z Offset exceeds limit Z offset out of allowable range Reset Z offset and re-calibrate CZ2768 Controller Z-axis homing issue (interference) External force during homing Avoid touching printer during homing, remove interference CM2783 Controller Obstacle detected during movement Axis or extruder resistance detected Remove obstructions, check for jams or collisions CM2781 Controller Motor speed limit exceeded Axis speed exceeds motor limits Reduce speed and re-slice CM2790 Controller Motor identification error Motor cable loose or motor damaged Check motor wiring, replace motor if needed CM2782 Controller Step-servo hardware issue Servo connection problem Check motor connections; platform may drop CM2798 Controller Step-servo initialization error Motor communication issue Power off, reseat cables, restart CP2559 Controller Chamber heating issue Chamber not heating correctly Ensure enclosure is sealed; check heater BS0508 Controller Storage space nearly full Insufficient internal storage Delete G-code or camera files CA2711 Controller Auto belt tension failure Belt tension module stuck Check tension module for mechanical issues CA0120 Controller Belt tension abnormal Belt tension too low Run Input Shaping / Vibration Optimization CA2710 Controller Belt tension module abnormal Hardware failure Replace belt tension module CP2519 Controller Chamber heater fan abnormal, chamber heating closed. Chamber heater fan abnormal, chamber heating closed. The chamber heater fan is not spinning or the speed is too low. Check the fan connection for looseness or if the fan is physically jammed. BM2512 Mainboard Motherboard temperature abnormal Overheating or cooling failure Check cooling fan, remove heat sources BM0110 Mainboard Motherboard connection failure Board connection issue Reseat cables or replace mainboard BM0111 Mainboard Nozzle connection abnormal Toolhead board issue Check toolhead wiring or replace board BM0112 Mainboard Hotbed connection abnormal Hotbed board issue Inspect wiring or replace hotbed board TE2509 Toolhead Nozzle thermistor open No temperature reading Check thermistor wiring or replace hotend TE2515 Toolhead Nozzle thermistor short circuit Temperature exceeds limit Inspect wiring, replace thermistor TE2564 Toolhead Nozzle not heating as expected Heating anomaly Check heater and thermistor TE2111 Toolhead Nozzle temp below extrusion limit Temperature below 170 °C Increase temperature or check hotend TR0116 Toolhead Filament runout Filament empty Reload filament and resume printing TR2852 Toolhead Filament sensor triggered abnormally Filament break or external spool conflict Check filament path and sensor TF0501 Toolhead Heat break fan speed too low Fan blocked or damaged Check wiring or replace fan TC2841 Toolhead Cutter issue detected Cutter jammed or missing Clear obstruction or reinstall cutter TC2854 Toolhead Filament present during cutter calibration Filament not unloaded Unload filament and retry calibration TC2855 Toolhead Cutter calibration failed Calibration error Resolve cutter issue and retry TC2856 Toolhead Cutter issue Cutter issue, the cutter may be jammed or missing. Click "Retry" after resolving. The cutter was detected as possibly jammed or missing during the cutting process. TE2762 Toolhead Nozzle leveling sensor issue Sensor damaged or detached Check sensor or restart TE2761 Toolhead Nozzle leveling sensor failure Hardware failure Replace leveling sensor TF0526 Toolhead Model fan speed too low Cooling fan malfunction Inspect fan wiring or replace TR2863 Toolhead The extruder filament sensor was triggered abnormally, and the filament may have broken inside the extruder. TR2858: Retract issue, extruder filament sensor anomaly triggered, filament may have broken inside the extruder. During CFS (Creality Filament System) usage, if the extruder filament sensor is triggered abnormally after retraction is complete, it may be due to the insertion of filament from an external spool holder during use, or the filament breaking inside the extruder during retraction. FR2833 CFS Feed issue, check for filament or spool jams Filament feed abnormal Filament tangled on spool; filament stuck in extruder or CFS hub. Clear jam and click Retry. FR2832 CFS Retract issue, check for filament or spool jams Filament retract abnormal Spool tangled; filament stuck in extruder or hub; filament not rewound properly during retract. FR2839 CFS Filament runs out, please refill Filament runout detected Filament in slot (example 1D) is empty. Insert new filament. FR2848 CFS Filament may be broken in CFS Filament break detected inside CFS hub Filament stuck or broken inside hub, cannot feed or retract normally. FS2831 CFS CFS communication issue CFS communication error CFS disconnected during operation. Check cable and power. FS2843 CFS RFID cannot be read RFID read failure RFID tag unreadable; manually edit filament type and color. FS2834 CFS CFS system error General CFS system error Filament tangled on spool; filament stuck in extruder or CFS hub. Clear jam and click Retry. FS2840 CFS Command failed, scenario not supported Command execution failed Another command is running or current state does not support the action. FB2844 CFS PTFE tube may have detached PTFE tube disconnected Pneumatic fitting loose. Retract filament, reseat PTFE tube, then retry. FO2845 CFS Extruder may be clogged Possible nozzle or extruder clog Filament not moving; check for tangles, grinding, or hotend clog. FB2846 CFS Filament buffer signal abnormal Buffer not responding Buffer stuck; filament not moving; possible clog or buffer hardware issue. FB2847 CFS Filament may be tangled Excessive filament resistance Spool knots, excessive PTFE tube length, or sharp tube bends. FR2835 CFS Feed issue from loader to hub Filament not reaching hub sensor Loader failure, damaged hub sensor, or excessive resistance. FR2836 CFS Feed issue from hub to extruder sensor Filament blocked before extruder High PTFE resistance, tight bends, or faulty extruder sensor. FO2837 CFS Feed issue near extruder gear Filament stuck at extruder gear Filament grinding or jam; try retract, cut filament tip, reload. FO2838 CFS Feed issue between hub sensor and gear Hub gear feed failure Filament detected but not advancing; inspect hub gear path. FR2849 CFS Retract issue, filament stuck at hub Filament cannot return to hub Excessive PTFE resistance or faulty hub sensor. Retry retract. FR2850 CFS Multiple filaments detected in hub Wrong filament inserted Remove extra filament from hub and retry. FR2851 CFS Retract issue, buffer failure Buffer cannot reset Buffer stuck or failed to return to idle position. FH2853 CFS Temperature & humidity sensor abnormal Sensor data unavailable Sensor connection or hardware failure inside CFS. FM2857 CFS Feeding motor overload Motor overloaded during feed/retract Excessive resistance, tangled filament, or PTFE blockage. FR0121 CFS CFS filament in use Conflict with external spool Unload CFS filament before printing with spool holder. FR0122 CFS Spool holder filament in use Conflict with CFS mode Unload external filament before printing with CFS. FS2858 CFS EEPROM abnormal EEPROM failure CFS mainboard EEPROM error; board replacement required. FO2859 CFS Filament odometry abnormal Odometry sensor failure Hardware fault; inspect or replace odometer module. FB2860 CFS Filament buffer abnormal Buffer hardware error Cable disconnected, buffer stuck, or hardware failure. FS2861 CFS Left RFID board abnormal Left RFID reader failure Replace left RFID board. FS2862 CFS Right RFID board abnormal Right RFID reader failure Replace right RFID board. FO0528 CFS Printing without extruding Dry printing detected No extrusion due to clog, filament break, or feed failure. FB2864 CFS Feed issue, buffer failure Buffer malfunction during feed Buffer not connected, stuck, or hardware failure. XS2000 AP System error, try restarting General system error Power off and restart the printer. If the issue persists, export/upload logs and contact Creality support. XS2001 AP System error, try restarting System exception detected Restart the printer. If unresolved, go to Help → Error Code History, find the error before XS2001, and troubleshoot that specific error. XS3000 AP System error, try restarting General system error Power cycle the printer. If restarting does not fix the issue, export logs and contact after-sales support. XS3001 AP System error, try restarting General system error Try a full power restart. If the error remains, export/upload logs and contact support. XS3002 AP System error, try restarting General system error Restart the system. If the issue persists, export logs and contact Creality support. XS2060 AP System error, try restarting System runtime error Power off and restart the printer. If unresolved, export logs for further diagnosis. XS2093 AP System error, try restarting System internal error Restart the printer. If the problem continues, upload logs and contact after-sales service. XD2571 AP Print file is corrupted Print file cannot be parsed Re-upload the file or rename it. Possible causes include unsupported characters in the filename or file corruption during transfer. AC0101 AI Detection Print quality issue detected, printing paused AI detected a potential print failure (e.g. spaghetti) print failure (e.g. spaghetti) This feature detects print failures during printing. If frequent false alarms occur, reduce sensitivity or disable AI detection. AC0104 AI Detection Foreign object detected on the printing plate, printing paused Object or abnormal condition detected on the build plate before printing Detected during Z-axis homing before print. If it’s a false alarm, tap Retry to re-home the Z-axis. AC0123 AI Detection Printing plate missing, printing paused Build plate not detected Triggered during Z-axis homing when the build plate is missing. If false, tap Retry to re-home. AC0124 AI Detection Printing plate missing and foreign object detected, printing paused Plate missing or object detected on the build plate Detected during Z-axis homing. If misdetected, tap Retry to retry homing. AC0500 AI Detection Printing quality issues detected by AI AI detected possible print quality issues If confirmed false, continue printing via printer screen, slicer, or Creality Cloud. If failed, clean the printer and restart printing. Disable via System Settings → Camera → AI Features. AC0504 AI Detection File does not support Auto PA calibration, using default values Auto Pressure Advance calibration not supported Causes include unsupported slicer or outdated firmware/slicer version. Firmware ≥1.3.3.0 supports Creality Print, OrcaSlicer, and PrusaSlicer. AC0510 AI Detection Camera failed to start, try restarting Camera startup failure Possible software crash or unstable hardware connection. Restart the printer and check camera connection. AC0511 AI Detection File does not support flow ratio calibration, using default values Flow ratio calibration not supported by the file Typically caused by non-Creality Print 5 sliced files. AC0512 AI Detection Flow ratio calibration failed, using default values Flow ratio calibration failed failed Calibration pattern printed, but camera recognition failed or values exceeded range. AC0513 AI Detection Auto PA calibration image anomaly, using default values Calibration image captured by camera is invalid Camera image unusable, causing calibration failure. AC0514 AI Detection Auto PA calibration failed, using default values Pressure Advance calibration failed Possible camera recognition issue, abnormal values, or poor calibration print quality. AC0515 AI Detection Flow ratio calibration image anomaly, using default values Flow calibration image anomaly Camera image unusable during calibration process. Creality K2 Pro Common Error Troubleshooting Guide BM0111 Error – Hotend Connection Abnormal Error message:

BM0111 – Hotend connection abnormal

What happens

The screen displays BM0111, indicating abnormal communication between the mainboard and the nozzle adapter board.

Possible causes

Power or communication issue between the nozzle board and adapter board Loose or damaged nozzle cable Faulty nozzle board or adapter board How to troubleshoot

1. Check whether the nozzle board shows a blue indicator light when the error appears.

2. If no blue light is present, confirm the adapter board supplies 24V power to the nozzle board.

3. Power off the printer and disconnect all cables from the nozzle board except the nozzle cable , then power on again to rule out interference from other modules.

4. Inspect the nozzle board, nozzle cable, and adapter board for burn marks, cold solder joints, cable damage, or poor contact.

5. If the issue persists, replacing the nozzle board and nozzle cable is recommended.

6. If replacement does not resolve the issue, contact Creality support .

AC0101 – Print Quality Issue Detected (AI Detection) Applicable models : K1C, K1 Max, K2 Plus, K2 Pro

Why it appears

This AI feature detects print failures during printing, mainly used to identify issues such as spaghetti failures .

How to solve it

If false alarms occur frequently, go to Settings → Camera → AI Functions and disable “Pause on fault” or turn off AI detection. If failures are often missed, increase sensitivity to Professional mode . CL2536 – Leveling Sensor Hardware Failure Applicable models : K1 Series, V3 Series, K2 Plus, K2 Pro

Why it appears

The leveling sensor detects a possible hardware malfunction, affecting Z-axis homing and auto leveling.

Troubleshooting steps

1 . Check sensor cables for looseness or detachment.

2 . Ensure no debris interferes with sensor operation.

3 . Restart the printer and perform Z-axis homing.

4 . If the issue remains, replacing the leveling sensor is recommended.

TE2761 – Unable to Read Extruder Leveling Sensor Data Applicable models : K2 Plus, K2 Pro

Why it appears

The SYNC signal self-check fails, often caused by poor cable contact between the extruder and mainboard.

Solutions

Check the nozzle ribbon cable and communication bus connections. Reseat all related cables and ensure firm connections. Replace damaged ribbon cables if necessary. Perform Z-axis homing to confirm recovery. Error Code 2355 – Extruder Communication Abnormal Typical symptoms

Common causes

Poor contact in the extruder drag chain cable Cooling fan cable being pinched by mounting hardware Troubleshooting

1 . Restart the printer and see if the issue reoccurs.

2 . Remove the right-side extruder cooling fan and inspect cable routing.

3 . Reseat fan cables and nozzle board connectors.

4 . Reinsert or replace the extruder drag chain cable if necessary.

5 . If unresolved, export logs for further analysis.

Extruder Clogging & Filament Jamming Typical symptoms

Filament expands or bends inside the extruder Material accumulates and fails to feed into the hotend Key causes

Chamber temperature too high for the filament (e.g., PLA softening early) Extruder cooling fan not spinning Nozzle or heat break blockage Fixes

Verify correct chamber temperature for the filament type Confirm extruder cooling fan operation at 100 °C Heat nozzle to printing temperature and clear blockage with a cleaning needle Replace the integrated nozzle if clogging cannot be removed K2 Series Screen Abnormal Trigger Typical symptoms

Possible causes

Screen ribbon cable not fully seated Strong electromagnetic interference nearby Poor grounding causing static interference Defective screen hardware Solutions

Reseat the screen cable Test the printer in an open area away from high-power devices Check whether the power outlet is properly grounded Replace the touchscreen if necessary Filament Purge Stuck at 300 °C (K2 / K2 Pro) Issue Description

On K2 / K2 Pro printers (firmware version ≤ 1.1.0.92), after printing with high-temperature filaments such as Creality Hyper PA612-CF, switching to low-temperature materials like PLA may cause the filament purge process to stall at 300 °C, with no purge action executed.

Root Cause

1 . The printer’s nozzle maximum temperature is limited to 300 °C

2 . High-temperature filaments (e.g., nylon) require 300–320 °C

3 . The purge logic works as follows:

First purges at the maximum temperature of the previous filament Then gradually cools down 4 . When the purge process requires 320 °C, but the printer is capped at 300 °C, the workflow becomes stuck

Temporary Workaround (Recommended) Modify Parameters via Fluidd

1 . Open a browser and access: http:// (printer_ip ):4408 Example: http://172.18.208.169:4408

2 . Go to Configuration Files and locate printer_params.cfg

3 . Modify the nozzle maximum temperature limit

4 . Save the file; Klippy will restart automatically

5 . After reboot, the purge process should resume normally

Note: This is a temporary workaround. A firmware update is recommended for a permanent fix.

Regular Arc Patterns and Surface Artifacts in High-Speed Printing (Kipper Series) Issue Description

When printing models with dense small-arc surface geometry at high speed using the official slicer, irregular layer artifacts may appear.

Root Cause

The model geometry triggers Arc Fitting Current firmware has precision conversion issues with arc fitting Errors become more noticeable at higher speeds Short-Term Optimization (Best Results)

1 . Disable Arc Fitting: Slicer → Quality → Turn off Arc Fitting

2 . Enable Non-Decelerated Outer Wall: Filament Settings → Cooling → Enable Non-Decelerated Outer Wall

3 . For higher quality requirements: Reduce printing speed appropriately

Model Collision During Sequential Printing (Temporary Fix) Issue Description

When using Sequential Printing:

Taller models are printed first Shorter models are printed afterward After completing a model, the nozzle retracts or homes without lifting the Z axis This may cause the nozzle to collide with and knock over previously printed tall models Root Cause

A logic handling issue between the slicer and firmware in sequential printing mode

Temporary Solution

Open the slicer and select the target printer (K2 Pro used as example) Go to Edit Printer → Extruder G-code Add the following command to the End G-code:【G1 Z300 F600】 Notes: 300 is the maximum Z height of the K2 Pro For other models, replace this value with the actual maximum Z height Users must adjust this value according to their printer model Nozzle / Heated Bed Temperature Fluctuations Causing Errors or Long Wait Times Issue Description

1 . Nozzle temperature fluctuates more than ±5 °C around the target temperature, eventually triggering Error 2564

2 . The heated bed reaches the target temperature but cannot cool down properly, remaining stuck in a waiting state

Root Cause

Unstable nozzle power control Unstable heated bed power control Solution 1: Nozzle PID Calibration 1 . On the printer screen, go to Settings → Expert Mode

2 . Select Nozzle PID Calibration

3 . Choose a commonly used printing temperature and tap Start

4 . Calibration takes approximately 5 minutes

5 . Restart the printer after calibration completes

Solution 2: Heated Bed PID Calibration (via Fluidd) 1 . Access Fluidd: http://（printer_ip）:4408

2 . Enter the following command in the console: BEDPID

3 . The bed will automatically cycle between 100 °C and 95 °C for calibration (about 20 minutes)

4 . After completion, enter: save_config

5 . The system will save the parameters and reboot automatically

Startup Error 2001 Caused by Corrupted Files Applicable Scenario

Printer shows Error 2001 immediately on startup System cannot enter the normal operating interface Solution (via SSH)

1 . Install MobaXterm: https://mobaxterm.mobatek.net/download.html

2 . Log in via SSH (printer IP can be found in Settings → Network)

3 . Enter the password：creality_2024

4 . Delete the corrupted file: rm /mnt/UDISK/creality/userdata/config/user_print_refer.json

5 . Run: sync

6 . Reboot the printer to restore normal operation

Creality K2 Pro Error Codes: Troubleshooting Guide

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