usb_disconnect
Moderate
Creality · FDM 3D Printers
Serial USB Connection to Host Computer Lost
Quick Answer
Error code USB_DISCONNECT on your Creality FDM 3D Printers means: Serial USB Connection to Host Computer Lost. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Replace the USB cable with a short, shielded, high-quality cable with ferrite cores
2
Disable USB selective suspend in the host computer power management settings
3
Add a ferrite choke to the USB cable near the printer end
4
If using OctoPrint on a Raspberry Pi, use a powered USB hub to ensure stable power delivery
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Shielded USB cable with ferrite cores
Powered USB hub
Clip-on ferrite choke
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