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).
The software asking you to connect a VCI even when it's plugged in. psa interface checker 440 verified
You might find many Lexia 3 cables online, but not all are created equal. A unit ensures: Older interfaces were often labeled as "B" versions