The primary cause of a clone interface failing is its interaction with the official VCDS software. When a clone is connected and the genuine, up-to-date VCDS software is launched, the software's anti-piracy measures can detect the unlicensed hardware. As a result, the software may corrupt or "revoke" the interface's internal firmware or license data, effectively "bricking" the device. This is often irreversible through software means alone, a problem well-documented by experienced users and clone vendors alike.
Clones generally use one of two microchip architectures. Your repair path depends on which chip is inside your device: vcds 2231 hex v2 clone repair work
What specific does VCDS show when you run a port test? The primary cause of a clone interface failing