Creality K1 and K2 error codes: what the key numbers mean
Creality K1 series printers show errors as a key number, such as Key 2564, while the K2 series and newer Creality OS firmware add a two letter prefix, such as TE2564. This page covers the most common codes on the K1C and K2 Plus Combo, with the meaning and fix from the Creality wiki.
Researched by Riley Hart · updated Oct 27, 2026 · How we research
As of October 27, 2026, the Creality codes that come up most are heating, leveling and filament feed errors. Key 2564 (TE2564 on Creality OS) means the nozzle is not heating as expected, and Key 2565 (CB2565) means the bed is not heating. Keys 2521 to 2529 point to the strain gauge leveling sensor. On the K2 Plus Combo, FR codes are CFS feed and retract problems, usually a tangled spool or a jam in the PTFE path. Creality says to restart and check the wiring first, and to export the log and contact support if the code is not in its table or keeps coming back.
| Code | What it means | What to do |
|---|---|---|
| Key 101 / AC0101 | AI camera saw a print quality problem (spaghetti) and paused | Check the print; resume if it is fine, or clean up and restart |
| Key 103 / AC0103 | First layer problem detected, print paused | Check the first layer; resume or restart after cleaning the plate |
| Key 104 / AC0104 | Foreign object detected on the plate | Clear the plate; patterned plates or glue residue can trigger it by mistake |
| Key 501 | Heat break (pipe) fan fault | Reseat the fan cable, check that no screw has dropped into the fan, replace the fan if it is damaged |
| Key 502 / CF0502 | Mainboard fan fault | Check the cable and that the fan can spin; replace it if damaged |
| Key 508 / BS0508 | Storage space almost full | Delete old files from the printer |
| Key 2001 | Timeout talking to the hotend board | Reseat the hotend cable; Creality may send a new cable or hotend board |
| Key 2111 / TE2111 | Nozzle is below the minimum extrusion temperature (170°C) | Use the official slicer profile; check the hotend heater if it repeats |
| Key 2504 | Z axis homing fault | Check that nothing blocks the bed or lead screws, then home again |
| Key 2505 | Motor driver chip (TMC) fault | Often overheating from a mainboard fan fault or printing too fast |
| Key 2509 / TE2509 | Cannot read the nozzle temperature; thermistor may be disconnected | Check the hotend wiring and connectors |
| Key 2510 / CB2510 | Hotbed thermistor fault (open circuit on Creality OS) | Check the bed wiring; contact support if it repeats |
| Keys 2521, 2522, 2524, 2529 | Leveling (strain gauge) sensor chip fault, sensor damage or interference | Restart, keep the printer on a steady surface, contact support if it repeats |
| Key 2526 | Z axis or lead screw not moving smoothly during leveling | Clean the Z lead screws and check for binding |
| Key 2533 | Bed does not match the saved leveling data | Run bed leveling again |
| Keys 2560 to 2563 | Lost communication with the main, hotend or bed board | Check the wiring connections and restart |
| Key 2564 / TE2564 | Nozzle is not heating as expected | Check the ceramic heater and thermistor wiring; reseat connectors |
| Key 2565 / CB2565 | Heatbed is not heating as expected | Reseat the bed wiring; check the bed power solder joints |
| XS2060 | System error, try to restart (K2 Plus) | Check for debris on the rails, a blocked waste chute or a bent wiper, then home again |
| CM2798 | X, Y, Z1 and Z2 motors all report an error at power on (K2 Plus) | Usually a communication fault; power off, follow the Creality 2798 guide, which starts by unplugging the extruder motor cable to test |
| FR2833 / FR2832 | CFS feed or retract problem | Check the spool and filament path for a jam, then press Retry |
| FR2836 | Filament blocked between the CFS hub and the extruder sensor | Check the PTFE tube and hub for a jam |
| FR2839 / TR0116 | Filament ran out | Load new filament |
| FM2857 | CFS feed motor overloaded | Look for a tangled or stuck spool or too much drag in the path |
| FB2844 | PTFE tube may have come out of its push fitting | Push the tube back in fully, then retry |
| FS2843 | RFID tag cannot be read | Set the filament type by hand |
| TC2841 / TC2856 | Cutter may be jammed or missing | Check the cutter, then retry |
| AC0119 | Waste chute is blocked | Clean the waste chute and try again |
| CA2711 | Automatic belt tensioning failed | Run the belt tension calibration again |
From the Creality wiki K1 Series Error Code Summary and the Creality OS Error Code list, checked October 27, 2026. K1 series screens show Key plus a number. Creality OS adds a two letter prefix. In the list, F codes cover filament and the CFS, T codes the toolhead, C codes motion, heating and calibration, A codes the AI camera and lidar, B codes boards and storage, and X codes the system. The Creality OS list has over 100 codes.
If the same code comes back after the fix, contact Creality support first, especially under warranty. Out of warranty, compare the repair quote with a new robot's price and 3 year cost.
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How Creality error codes work
On the K1, K1C and K1 Max, an error pops up as Key followed by a number, for example Key 2564. The Creality wiki groups these in its K1 Series Error Code Summary. Numbers in the 100s and 500s are mostly AI camera, lidar, fan and storage messages. Numbers in the 2000s are firmware and hardware faults such as heating, homing, leveling and board communication.
Newer Creality OS firmware, used on the K2 series, adds two letters in front of the number. The letters group codes by area: codes starting F are filament and CFS faults, T codes are toolhead faults, C codes are motion, heating and calibration faults. Creality does not spell out each letter. The number often matches the older key, so TE2564 and Key 2564 are the same nozzle heating fault.
Creality says that if your code is not in its table, you should export the log from the printer and send it to after sales support for analysis.
Heating and temperature codes
Key 2564 means the hotend heater is on but the temperature does not rise. Creality says to check the ceramic heating block and its wiring and reseat the terminals. Key 2565 is the same problem for the bed; reseat the bed wiring and check whether the bed power solder joints have come loose.
Key 2509 and 2510 mean the printer cannot read the nozzle or bed thermistor. Key 2111 means the nozzle is below 170°C, the minimum extrusion temperature on Creality OS. That one is often a slicer profile problem, so use Creality Print or an official profile for your exact printer.
Leveling and motion codes
The K1 series uses strain gauges under the bed to sense the nozzle touching down. Keys 2520 to 2529 cover that system. Some point to a damaged sensor or chip, others to data lost during the measurement, and 2524 and 2529 can also be caused by vibration or the environment. Put the printer on a solid table, restart, and run leveling again.
Key 2526 means the Z motor lost steps during leveling, which Creality links to a Z axis or lead screw that does not move smoothly. Cleaning and checking the lead screws is the first step. On the K2 Plus, error 2060 shows as System error, try to restart. Creality says to look for anything fallen on the Y rail, a clogged waste chute, or a bent or low nozzle wiper that catches the hotend.
CFS filament codes on the K2 series
The CFS is the multi color feeder on the K2 Plus Combo. Its codes start with F. Most are feed or retract problems where filament is caught somewhere between the spool, the CFS hub and the extruder. Check that the spool turns freely, that the filament has not crossed over itself, and that each PTFE tube is fully pushed into its fitting. Then press Retry.
FS2843 only means the RFID tag on the spool could not be read. Set the filament type by hand and carry on. FR2839 and TR0116 just mean the filament ran out.
When a repeat error means a worn part
If heating codes keep returning after you reseat the cables, the hotend heater, thermistor or hotend cable is likely failing. Creality notes that Key 2001 and 2506 often come from a poor hotend cable and that the fix can be a new cable or hotend board. Key 501 and 502 that come back with a clean, free spinning fan mean the fan itself is worn.
Jam codes that repeat on every print, even with dry filament, often point to a worn or partly blocked nozzle, or a cutter that no longer cuts cleanly. Creality publishes replacement guides for the K2 Plus nozzle, hotend, cutter, strain gauge and PTFE tubes. Leveling sensor codes that come back on a steady table point to a damaged strain gauge.
When to contact Creality support or use the warranty
Contact Creality if a hardware code keeps coming back after a restart and a wiring check, or if the code is not on either list. Creality asks for the exported log, so export it from the printer settings first. Several entries on the K1 list say to email [email protected] if the fault happens often.
Have your serial number, firmware version, the full code and a short video ready. If the printer is new, ask about a warranty part before you buy one yourself, and do not open the mainboard area unless support asks you to.
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Questions people ask
What does Key 2564 mean on a Creality K1?
It means the nozzle is not heating as expected: the heater is on but the temperature does not rise. Creality says to check the ceramic heating block and wiring and reseat the terminals, and to contact support if they are damaged.
What does Key 2565 mean?
The heated bed is not heating as expected. Reseat the bed wiring and check whether the bed power solder joints have come loose. If they have, contact Creality.
What is error 2060 on the Creality K2 Plus?
The screen shows System error, try to restart. Creality links it to the toolhead being blocked: something on the Y rail, a clogged waste chute, or a bent or low nozzle wiper. Clear the cause, then home the axes again.
What do the letters in Creality OS codes like TE2509 mean?
Creality does not define each letter, but its list groups codes by area. F codes are filament and CFS, T codes the toolhead, C codes motion, heating and calibration, A codes the AI camera and lidar, B codes boards and storage, and X codes the system.
My Creality error code is not on the list. What now?
Creality says to export the log from the printer and send it to after sales support for analysis.