: Poor soldering on the OBD-II pins or the internal PCB is common in clones. Reflowing dry joints can restore lost communication.
There are several reasons why a VCDS HEX V2 clone may fail: vcds hex v2 clone repair
But then, the inevitable happens.
Soldering iron (fine tip), leaded solder, flux, desoldering wick. : Poor soldering on the OBD-II pins or
: Most clone "repairs" involve using a hardware programmer (like a USBasp or ST-Link) to re-write the firmware directly to the internal chip (often an Atmel ATMEGA or ). vcds hex v2 clone repair
Attempting to update a clone via the official Ross-Tech Config Utility can result in flashing red lights, indicating the device is stuck in an update loop.