The printer shows an error code or message
82 usi3d guides for “The printer shows an error code or message”, each with the likely causes, how to check which one is yours and the step-by-step fix, with each manufacturer's official sources.
5 apply to any FDM printer and 77 are for Anycubic, Bambu Lab, Creality, Elegoo, Flashforge, Formlabs, Prusa, Qidi, Snapmaker, Sovol, UltiMaker and Voron printers.
Each guide summarises the official documentation and says whether usi3d has already verified it on a machine.
Any FDM printer (5 guides)
- Homing or the leveling probe fails (endstop, BLTouch/CRTouch, inductive or load cell)
When homing, an axis keeps pushing against the end, stops too early, or the printer shows a homing or bed probing error.
- Klipper: board communication errors (Lost communication with MCU, MCU shutdown, Move out of range)
The print stops and Klipper shows an error: “Lost communication with MCU”, the board (MCU) goes into a shutdown state, or “Move out of range” appears, sometimes right…
- Problems after a firmware update
After updating, the display shows squares or strange symbols, configuration or memory (EEPROM) errors appear, the first layer or temperatures no longer behave as before…
- Temperature error: Thermal runaway, MINTEMP, MAXTEMP or Heating failed
The printer turns off the heaters, stops and shows a temperature error: in Marlin and derived firmware, “Thermal runaway”, “Heating failed”, “MINTEMP” or “MAXTEMP”…
- The filament sensor gives false alarms or doesn't detect runout
The printer pauses saying there's no filament (or that it's stuck) when there is, asks you to unload and reload for no reason, or autoload doesn't work.
Anycubic (13 guides)
- Kobra 2: auto-leveling fails with a module or abnormal leveling warning
During auto-leveling on the Kobra 2, Kobra 2 Pro or Kobra 2 Max, the printer stops with a warning such as «Leveling is abnormal,please check whether the wiring of the…
- Kobra 3 or Kobra S1 with ACE Pro: error 11511, 11512 or 11518 (filament will not feed, will not retract or jams)
The Kobra 3 Combo, or the Kobra S1 with the ACE Pro, pauses with code 11511 (on the Kobra 3, «Extrusion abnormal»), 11512 («Retraction abnormal») or 11518 («Filament…
- Kobra S1 or Kobra 3: a print head fan does not spin or is noisy (error 11950 on the S1)
On the Kobra S1 or Kobra 3 a print head fan, the part cooling fan (which cools the model) or the hotend fan, does not spin, runs unevenly or is noisy.
- Kobra S1 or Kobra 3: error 10411 (mainboard TMC driver overheating; mainboard fan)
The Kobra S1, Kobra 3 or Kobra 3 V2 stops printing with «CODE: 10411 TMC or extruder overheat.
- Kobra S1 or Kobra 3: errors 10121, 10122, 10123 or 10124 (bed or printhead not heating, or thermistor fault)
The Kobra S1 or Kobra 3 stops with 10121 (hotbed heating abnormal), 10122 (extruder heating abnormal), 10123 (hotbed NTC abnormal) or 10124 (extruder NTC abnormal).
- Kobra S1 or Kobra 3: errors 10237 (auto levelling), 10108 (nozzle scraping the bed) or 10130 (Z homing)
The Kobra S1 or Kobra 3 stops with «CODE: 10237 Auto leveling error.
- Kobra S1: little or no filament comes out (hotend clog or error 11518)
On the Kobra S1 the extruder motor turns but little or no filament comes out, the extruder clicks, or the extruded line is thinner than normal and the walls have gaps.
- Kobra S1: won't connect to Wi-Fi, the cloud or the app, or the camera shows nothing (11402, 10105)
The Kobra S1 will not connect to Wi-Fi («Network connection failed»), shows code 11402 (network connection timed out) or 10105 (file download failed), the corner of the…
- Photon Mono M5s: leveling, resin, layer or dropped-print monitoring warnings
The Photon Mono M5s monitors the print with a pressure sensor and stops with a warning: «Leveling monitoring error», «Resin monitoring error», «Layered monitoring error»…
- Photon Mono M7 Pro or M7 Max: warnings about residue in the vat, not enough resin, or model fell off/incomplete
The Photon Mono M7 Pro or M7 Max stops or warns with «Residue detected», that there is not enough resin left in the vat, or «Print abnormality, model fell off the…
- Photon Mono M7 Pro: replacing the ACF film (bumps, cured resin, leaks or code 305)
On the Photon Mono M7 Pro the ACF film of the resin vat has bumps, wrinkles, stains or cured resin on it, it leaks resin, the printer reports «Residue detected, please…
- Photon Mono M7 Pro: the print does not stick to the build plate or leveling fails (code 303)
On the Photon Mono M7 Pro the print cures stuck to the ACF film of the resin vat instead of the build plate, only the base sticks, or the printer reports «Leveling…
- Photon Mono M7 Pro: the resin vat does not heat the resin or code 307 appears
The Photon Mono M7 Pro reports «Heating abnormality, heating has ended (CODE: 307)» and stops heating the vat, or in a cold room the prints fail because the resin is not…
Bambu Lab (19 guides)
- A1 and A1 mini with AMS lite: won't load, won't extrude or won't pull the filament out of the toolhead
With the AMS lite, the A1 or A1 mini stops when loading or changing colour with alerts such as «Unable to feed filament into the extruder», «Failed to extrude the…
- A1 and A1 mini: Z homing or bed levelling fails (hotend eddy current sensor)
The A1 or A1 mini reports «Z homing failed» or levelling fails: the toolhead comes down a little and stops without touching the bed, drops quickly and goes back up, taps…
- AMS 2 Pro or AMS HT: the printer doesn't detect it or it won't dry the filament
The printer does not recognise the AMS 2 Pro or the AMS HT: on the AMS 2 Pro, the LEDs of all four slots double-flash red and it does not appear on the screen or in the…
- Bambu Lab build plates: print won't stick, plate not recognised or not matching the G-code
The first layer does not grip the Bambu Lab plate, or the printer complains about the plate: the marker is not detected (0300-8006, 0C00-0300-0002-000C), the detected…
- Bambu Lab: what an HMS code or an error code means and how to find its guide
The Bambu Lab printer (or Bambu Studio or Bambu Handy) shows an alert with a code: a long one made of four blocks such as 0300-0200-0001-0007 (HMS code), or a short one…
- Fan error: hotend fan running slow (0300-0300-…) or part cooling fan stopped (0300-0400-0002-0001)
The printer warns that the hotend (heatsink) fan is slow or stopped, for example 0300-0300-0002-0002, or that the part cooling fan is slow or not spinning…
- H2D: extrusion motor overloaded (0300-0900-0002-0001) or one nozzle stops extruding
The H2D pauses the print with an alert saying the extrusion motor is overloaded and that the extruder may be clogged or the filament stuck in the toolhead, or one of the…
- H2D: the two nozzles don't line up (shift when switching nozzles) or nozzle offset calibration fails
In a print using both nozzles, what one nozzle prints is offset from what the other prints, like a step or a layer shift right at the nozzle change, or the nozzle offset…
- My Bambu printer won't join Wi-Fi, won't bind to Bambu Handy or Bambu Studio, or cloud access fails
The printer will not join the network, gets no IP address (it shows 0.0.0.0), says the password is wrong, does not appear when binding it in Bambu Handy or Bambu Studio…
- My Bambu printer won't read the microSD card or shows card errors
The printer asks for a microSD card (0500-400C) or reports that the card is write-protected (0500-4016), has damaged sectors (0500-402F), has a read/write error…
- Nozzle or bed temperature errors (HMS 0300-0200-… and 0300-0100-…)
The printer shows a nozzle temperature error (for example 0300-0200-0001-0001, heater short circuit, or 0300-0200-0001-0007, sensor open circuit; the A1 usually shows…
- The AMS won't load filament: «Failed to feed», assist motor overloaded or no extrusion
With an AMS (also AMS 2 Pro or AMS HT) loading or a colour change stops with an alert: the filament does not leave the AMS (0700-8005, «Failed to feed the filament…
- The AMS won't unload filament: it won't leave the extruder, won't return to the AMS or «filament broken in the toolhead»
When unloading or changing colour, the AMS stops with an alert: it cannot pull the filament out of the extruder (0700-8003), cannot return it to the AMS (0700-8004…
- The Bambu camera won't show in Bambu Studio or Bambu Handy (black screen or Liveview error)
The live video (Liveview) does not load: black screen, an error while initializing, loading or connecting, or the alert «Liveview service is malfunctioning»…
- The Bambu firmware update fails or can't be done online (updating from the microSD card)
The update download stops or fails, the printer has no internet access to update, you need to go back to an older version, or after connecting an AMS Hub the printer…
- The filament cutter gets stuck («The cutter is stuck») or fails to cut
When unloading or changing colour, the printer stops with «The cutter is stuck» (for example 0300-800B, 0700-8002 with the AMS or 1200-8002 with the AMS lite) or with…
- X1 and P1: clogged nozzle or hotend (0300-4006) and how to clear it
The X1 or P1 stops extruding or extrudes little and unevenly, the filament curls when extruded by hand, or the printer reports a clogged nozzle (0300-4006 or 0300-8016).
- X1 and P1: homing or bed levelling fails (Z homing failed, plate not placed properly, force sensors)
While preparing a print, the X1 or P1 stops with «Z-axis homing failed» or with alerts such as 0300-0D00-0002-0001 (bulge on the plate or dirty nozzle)…
- X1: Micro Lidar alerts (dirty lens, failed calibration, nozzle height) and first layer inspection
The X1, X1 Carbon or X1E shows Micro Lidar alerts such as «Micro Lidar lens seems to be dirty» (0C00-0100-0001-0004), «Failed to calibrate Micro Lidar»…
Creality (11 guides)
- CFS: what its lights mean and what to do if the printer does not detect it
The slot lights on the CFS (Creality's multi-colour system) flash or stay red, or the CFS turns its screen on and pre-feeds filament but the printer does not detect it.
- Creality Print or Creality Cloud will not send the print (Upload Failed, Send Failed) or the printer shows offline
When sending a job from Creality Print over the local network or the Internet you get «Upload Failed» or «Send Failed» with a number in brackets (7, 9, 25, 26, 28, 55…
- Ender 3 V3 KE: the vibration sensor is not recognised, the screen flickers or ringing appears (input shaping)
When you connect the vibration compensation sensor (G-sensor) to the Ender 3 V3 KE for input shaping, the screen says no sensor is recognised or starts flickering; or…
- Ender 3 V3 or V3 Plus: the hotend does not heat (error 2564 or 111) or it restarts while heating
The Ender 3 V3 or V3 Plus shows «Error, key: 2564, the extruder is not heating as expected», gives error 111 at start-up or while printing (communication between the…
- Ender 3 V3 SE or KE: leveling fails, CR Touch error or the nozzle scratches the bed
On the Ender 3 V3 SE or KE automatic leveling stops with an error (leveling failure, CR Touch error or height measurement failure), the nozzle keeps probing the lower…
- Ender 3 V3 SE: nozzle or bed temperature too low or too high, or it restarts while heating
The Ender 3 V3 SE reports that the nozzle or bed temperature is too low (it does not reach the set temperature in time) or too high (usually right after switching on)…
- K2 Plus: the waste chute clogs and the purge does not fall out (sometimes with error 2060)
The purge waste the nozzle ejects when changing filament or starting a print piles up in the waste chute and does not come out.
- The K1 levels badly: the nozzle scrapes the bed in some areas and the layer is too high in others
On the K1, K1C or K1 Max the first layer is not the same across the plate: in some areas the nozzle scrapes the surface and in others the line is too high or does not…
- The K1 pauses itself due to AI detection (101, 103, 104) or warns about the LiDAR (505, 506, 507, «LiDAR not detected»)
The K1 series printer stops printing with an AI detection warning: 101 (spaghetti detected), 103 (first layer problem) or 104 (foreign object on the bed), sometimes even…
- The K1 shows a «key» error for the print head or bed (2000, 2001, 3002, 2564, 2565)
The K1, K1C or K1 Max screen shows an «Error, key: …» window and the printer stops or does not finish booting.
- The K2 Plus CFS will not load or retract filament (codes FR2833, FR2836, FB2847…)
With the CFS (the multi-material system) the K2 Plus stops when loading, retracting or changing colour and shows a code starting with F, for example FR2833 (feed issue)…
Elegoo (14 guides)
- Centauri Carbon 2 with CANVAS: filament will not load or unload (errors 1241, 1242, 1251 or 1265)
With CANVAS (standard on the Combo), the Centauri Carbon 2 cannot bring the filament to the print head or pull it back: the slot light flashes red, the print pauses and…
- Centauri Carbon 2: errors 101, 102, 103 or 104 (bed or print head not heating, or a thermistor fault)
The Centauri Carbon 2 stops with error 101 (check the heated bed and its wiring), 102 (heated bed temperature sensor disconnected), 103 (check the print head and its…
- Centauri Carbon 2: fan errors 701, 702, 703, 705 or 706
The Centauri Carbon 2 reports a faulty fan: 701 (mainboard fan), 702 (hotend heat break fan), 703 (part cooling fan), 705 (auxiliary fan) or 706 (chamber fan).
- Centauri Carbon 2: leveling fails with error 704 or 605 (bed pressure sensors)
During auto leveling, the Centauri Carbon 2 stops with error 704 («Leveling failed») or 605 (pressure sensor data error); sometimes the nozzle probes the same spot again…
- Centauri Carbon 2: no filament coming out, clogged nozzle or errors 1243, 1263 or 1264
The Centauri Carbon 2 does not extrude or under-extrudes, or stops with error 1243 (extrusion failed at the toolhead: check whether it is clogged) or with 1263 or 1264…
- Centauri Carbon: «Extrusion Abnormality» warning or no filament coming out
The Centauri Carbon stops with the «Extrusion Abnormality» warning or stops extruding through the nozzle even though filament is loaded.
- Centauri Carbon: errors 101, 102, 103 or 104 (bed or printhead not heating, or a thermistor fault)
The Centauri Carbon stops with «Error Code: 101» (the heated bed did not heat up as expected), 102 (anomaly reading the bed NTC thermistor), 103 (the print head did not…
- Centauri Carbon: leveling error 502 (leveling sensor data collection error)
During automatic leveling on the Centauri Carbon, the nozzle probes the same spot again and again or keeps pressing down on the plate, and the screen shows code 502…
- Centauri Carbon: self-test stuck at «Input Shaping» or error 401 (accelerometer)
During the first-use self-test, or when calibrating Input Shaping manually, the Centauri Carbon screen stays stuck on the Input Shaping step and does not continue, or…
- Neptune 4: Klipper errors «Extrude below minimum temp», «Move exceeds maximum extrusion» or «MCU shutdown»
The screen or Fluidd on a Neptune 4 (4, 4 Pro, 4 Plus or 4 Max) shows «Please run 'SDCARD RESET FILE' or 'FIRMWARE RESTART' to resume» followed by «Extrude below minimum…
- Neptune 4: Klipper motor error («TMC stepper… reports error», «No trigger on x…»)
The Neptune 4 or 4 Pro screen (or Fluidd) shows a motor error at power-on, when homing or while printing, and the printer stops.
- Saturn 4 Ultra 16K: cold resin or «Resin heating anomaly» message (heated resin tank)
In a cold room, the Saturn 4 Ultra 16K fails its prints: the base does not stick to the build plate or the supports come away from the model.
- Saturn 4 Ultra 16K: the print stays in the resin tank or comes off the build plate
On the Saturn 4 Ultra 16K the base of the print does not stick to the build plate, the print comes off and falls into the tank at some height or in the centre of the…
- Saturn 4 Ultra 16K: the self-test fails (auto-leveling, mechanical sensor or resin tank not detected)
In the pre-print self-test, the Saturn 4 Ultra 16K stops with «Auto-leveling failed, please troubleshoot», with a mechanical sensor error or with a resin tank error…
Flashforge (1 guide)
- Adventurer 5M: temperatures at 0 °C or negative, or errors E0002, E0005 or E0011
The Adventurer 5M (or 5M Pro) shows the nozzle and bed at 0 °C, or the nozzle at a negative value and not heating, or it stops with «E0002 Communication with MCU…
Formlabs (3 guides)
- Form 3: defects from a dirty optical window or film, or LPU errors (246, 67, 68)
On a Form 3, Form 3+ or Form 3L, parts come out with defects because the laser arrives diffused or weakened, or the printer shows a communication error with the Light…
- Form 4: cartridge and resin level errors (1.6.2, 1.9.4, 1.9.5, 1.9.6, 1.9.22, 1.9.23)
The Form 4 or Form 4L will not start or pauses the print with a cartridge or resin level error: 1.6.2 (cartridge is missing), 1.6.27 (cartridge mismatch), 1.9.4 (could…
- Form 4: debris in the tank (errors 1.1.6, 1.1.7, 1.7.2, 1.7.3), damaged film or tank not detected
After a failed print, the Form 4 or Form 4L reports that the mixer hit debris (1.1.6 or 1.7.2) or that the build platform found debris when lowering (1.1.7, 1.7.3 or…
Prusa (8 guides)
- Load cell errors on MK4, MK4S and CORE One
The screen shows a load cell error (the print-head sensor that detects when the nozzle touches the sheet) and the printer does not continue.
- MK3S+: the IR filament sensor fails (asks for filament change, no autoload or no run-out detection)
On the MK3S+ autoload does not start when you insert filament, the printer does not pause when the filament runs out, or at the start of every print it asks you to…
- MK3S+: wrong first layer height, nozzle hits the bed or bed leveling fails (SuperPINDA)
On the MK3S+ the first layer is too high or too squished, the nozzle scrapes or crashes into the sheet, XYZ calibration fails, or you see «Bed leveling failed.
- Multi-tool XL: a tool is not picked up or parked properly (dock and toolchanger)
The XL fails to pick up or drop off a tool at its dock, a tool bumps into a parked one, or a toolchanger error appears, such as «Toolchanger problem» (#17813), which…
- Multi-tool XL: colours do not line up or tool offset calibration fails
On an XL with several tools, what each head prints is shifted relative to the rest, or the offset calibration fails with «Tool offset out of bounds» (#17104) or with «XY…
- My Prusa shows an error with a five-digit code and a QR code
The Prusa printer shows an error screen with the name of the problem, a short description, a QR code, a link and a five-digit number preceded by #, for example #13202.
- The MMU3 does not load, does not unload or the filament gets stuck
The MMU3 stops at a colour change and the printer shows an error, for example «FINDA didn't trigger» (#04101), «FINDA: Filament stuck» (#04102), «Filament sensor didn't…
- The Nextruder filament sensor does not detect filament properly (MK4, MK4S, CORE One)
The printer says there is no filament when there is, or the other way round; it pauses the print for no reason, will not let you load, the sensor calibration fails in…
Qidi (1 guide)
- QIDI Q1 Pro: errors «Probe samples exceed samples_tolerance», «ADC out of range» or «MCU MKS_THR»
The Q1 Pro stops and shows a Klipper message on screen such as «!!Probe samples exceed samples_tolerance, probe failed» when levelling, «Mcu mcu shutdown: Thermocouple…
Snapmaker (3 guides)
- Artisan: errors 13-12, 13-17, 13-18, 13-13 or 13-15 on the dual extrusion module
On the Snapmaker Artisan the print pauses and the screen shows 13-17 or 13-18 (the extruder is continuously pulled up) or 13-12 (the calibration sensor is abnormally…
- J1/J1s: the two print heads do not line up or bed calibration fails
On a Snapmaker J1 or J1s, the layers of the two materials are shifted relative to each other, or calibration fails: the bed keeps rising and the nozzle presses into it…
- Snapmaker 2.0: the touchscreen does not detect the 3D printing module or any toolhead
After swapping modules, the Snapmaker 2.0 touchscreen does not recognise the 3D printing module, or none of the toolheads (3D printing, laser or CNC).
Sovol (2 guides)
- SV08: the screen shows «Error 8» (or 21 or 3): how to find the cause from the Mainsail message
The SV08 shows an error number on the knob screen (Error 8, sometimes 21 or 3) at power on or during a print.
- SV08: the Z probe fails or the bed mesh is very uneven («probe triggered prior to movement», «No trigger on z…»)
On the SV08 the print head hits the bed or does not stop when going down; QGL (gantry leveling) or homing stops with messages such as «probe triggered prior to…
UltiMaker (1 guide)
- UltiMaker S: print core not recognised, incompatible or clogged, or the feeder grinds the filament
The UltiMaker S reports that it does not recognise a print core or that it is not compatible with the loaded material; or material does not flow consistently (gaps, thin…
Voron (1 guide)
- Voron 2.4 and Trident: QUAD_GANTRY_LEVEL or Z_TILT_ADJUST fails or does not converge
When levelling the gantry of a 2.4 (QUAD_GANTRY_LEVEL, QGL) or the bed of a Trident (Z_TILT_ADJUST), the process stops with an «out of bounds» error, fails because the…
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