| Error Message | Likely Cause | Fix | | :--- | :--- | :--- | | | Driver conflict or bad cable. | Re-install FTDI drivers. Try a different USB cable. | | “Communication timeout” | Engine not in diagnostic mode. | Ensure engine key is ON. Some engines require a kill switch lanyard attached. | | “Invalid license key” | Crack failed or antivirus deleted the patcher. | Disable Real-Time Protection. Re-copy the cracked .exe. |