Your printer is showing a cryptic error code and you need a fast answer. This page is a quick-reference table for the most common error codes across Bambu Lab, Prusa, and Creality — what each one means in plain English and the first step to resolve it. For deep-dive articles on specific error classes, see the related links at the bottom.
Use Ctrl/Cmd+F on this page to search for your code. Codes are grouped by brand. Most are wiring/cable issues at the hotend (caused by movement fatigue), filament jams, or a stalled sensor — in that order of frequency. If a code suggests "system error", power-cycle first; if it persists, contact support with a photo of the error screen and a description of what you were doing when it triggered.
Bambu uses an alphanumeric prefix system. The first 2 letters indicate the subsystem (TE = temperature/extruder, FB = filament buffer, AC = AI camera, etc.) and the digits identify the specific fault. Bambu's official error code dictionary on the wiki lists hundreds; below are the ones operators see most often.
Prusa firmware (Buddy on MK4 and beyond, RepRap on older boards) uses descriptive names rather than alphanumeric codes. The most common errors:
Creality's K1, K2, F (Falcon), and V (Ender 3 V3) series use Klipper-derived firmware ("Creality OS") with a brand-specific alphanumeric error code system. Below are the most-common operator-facing codes (taken from the Creality general documents wiki).
If a code persists after the first-step fix, the brand's support team will respond fastest if you include: