While XeLL is robust, it is sensitive. When you see "Code 18" displayed on the screen (usually via an HDMI or VGA cable connected directly to the console during the boot phase) or referenced in logs, it generally indicates that XeLL could not successfully read or mount a required file system or device.

Repeat this three more times until you have a 4-digit code (e.g., 0102, 0022, or 0012). ConsoleMods Wiki Common Related Codes for RGH/JTAG

: It is typically caused by cold solder joints under the RAM chips or the GPU/XCGPU .

When you successfully glitch or JTAG a console, you bypass the Microsoft signature checks. The console then boots a custom firmware environment. If you see "Code 18" on a black screen with white text (often alongside CPU/DVD keys), it means: