Open the ECU and inspect the BDM pads. If the car was previously tuned or has water damage, these pads may be compromised.
If the menu is grayed out or the error persists across all protocols, the internal SD card may be the culprit. Carefully open the K-TAG unit and remove the SD card. Clean the contacts and reinsert it. hardware configuration not supported ktag
This is the leading cause. Many ECUs require a stable voltage—often between 13.4V and 13.8V —to initiate communication. If you are relying solely on a standard 12V 2A adapter, the voltage drop during identification can trigger this error. Open the ECU and inspect the BDM pads