Write down the exact alert shown on the Ender-3 V3 KE screen before you clear it, tap it away, or restart the print. The KE’s firmware reports faults as a four-digit “Key” number, for example Key: 2016 or Key: 2401, not as a plain-English message, so the number itself is the only reliable identifier once the screen is dismissed. Note what the printer was doing when the alert appeared (self-test and auto-calibration, print start, preheating, or mid-print), whether you had just changed a slicer profile or firmware version, and whether any cable or connector had been disturbed. That context narrows the cause faster than the number alone.
Look up the code on Creality’s own troubleshooting index for this model at wiki.creality.com/en/ender-series/ender-3-v3-ke/troubleshooting, which lists individual pages for specific Key numbers such as 2000, 2016, 2022, 2111, 2171, 2194, 2401, and 2564. The Ender-3 V3 KE runs Klipper-based firmware (the “KE” stands for Klipper Edition), so its alerts use this numeric Key system instead of the plain text messages like MAXTEMP or MINTEMP found on older Marlin-based Ender-3 printers. Do not assume a fix from a Marlin-based Ender-3 guide, from the entry-level Ender-3 V3 SE, or from the CoreXY K1C applies here: each of those runs different firmware and lists its faults on its own separate wiki section. Match the Key number to the KE-specific page before you act on any advice.
Several of the documented Key codes trace back to setup rather than a hardware fault, so check these first. Key 2016, 2111, and 2171 usually appear when a third-party slicer was not set to the Ender-3 V3 KE machine profile or when start G-code was edited manually, and Creality’s fix is to reslice with the stock profile and default start G-code. Key 2022 points to X, Y, or Z homing failure or CR-Touch probe misalignment, often from debris on a rail or a probe knocked out of position. Key 2194 usually comes from the ribbon cable at the print head adapter board losing contact and needs reseating rather than a part swap. Key 2401 typically means the nozzle struck the lower-left corner of the bed during the self-test, which points to an incomplete first-time setup or calibration. Key 2564 shows up when the nozzle does not reach its preheat target in the expected time, which is a heating delay rather than a runaway condition.
Do not keep restarting prints and clearing the alert without recording the Key number first, since the exact digits are what determine which fix applies. Do not apply a Marlin thermal-runaway procedure, a K1C bed leveling routine, or an SE-specific fix to the KE on the assumption that Ender-3 printers share one error system, since the toolhead, board, and firmware differ between these models. Do not force an axis through a homing or self-test failure by pushing it by hand, and do not disassemble the hotend or toolhead based on generic advice before you have confirmed which specific code triggered the alert.
If the code repeats after you have followed the steps on its specific wiki page, or if the Key number you see has no listed troubleshooting page, contact Creality support or post on forum.creality.com. Provide the exact model name (Ender-3 V3 KE), the full Key number from the screen, the current firmware version, the slicer and profile used, and the steps you already tried. Keep a photo of the on-screen alert until the issue is resolved, since support may ask for it to confirm the code.
Creality documents alerts model by model instead of using one shared list, and the Creality K1C error code index and Creality SparkX i7 error code index show how differently those numbering systems read on Creality’s CoreXY and enclosed machines. Treat the Ender-3 V3 KE’s own troubleshooting pages as the only source for its Key codes.
The CoreXZ base Ender-3 V3 error message index documents the standard model’s own Key codes, distinct from both the KE’s Klipper-based set and the SE’s plain-text alerts.
The V3 Plus documents its own version of the shared Key 2022 homing fault with a different cause list; see the Creality Ender-3 V3 Plus Error Code Index for that comparison.