If you have the utility, follow these steps to verify your hardware:

It can be flashed with the latest firmware (e.g., 4.3.7) without "bricking" or being blocked by Diagbox.

It contains all the necessary optocouplers and relays (usually 12 or more) required for stable communication.

If your interface is not showing as "440" or "Revision C," you may experience: when opening Diagbox.

Older interfaces were often labeled as "B" versions. While these worked for older cars using Lexia 3 or PP2000 software, they frequently fail or "timeout" when used with newer versions of Diagbox (v7.xx, v8.xx, or v9.xx).