Re-insert the dongle into a different USB port; re-install Guardant drivers. The software cannot communicate with your PassThru device.
By following this guide, you ensure you have the correct, verified tools to safely program your ECUs without the risks associated with unverified or counterfeit software. pcmflash 120 download verified
Third-party security dongle drivers can sometimes trigger false positives in Windows Defender. Temporarily pause real-time protection or prepare to add the installation directory to your antivirus exclusion list. Re-insert the dongle into a different USB port;
Always connect a clean, dedicated battery maintainer to the vehicle. Voltage drops below 12V during a write cycle can permanently brick an ECU. Voltage drops below 12V during a write cycle
PCMFlash utilizes specific software packages called modules to communicate with different vehicle makes, models, and processor types.
PCMflash v1.20 was designed primarily for Windows 7, 8, and 10 [21†L5-L6][21†L9-L10]. While many users have successfully run the software on Windows 11, some have reported severe stability issues, including blue screen loops when installing Guardant drivers [16†L13-L14]. For maximum reliability, a clean installation of Windows 10 (64-bit) is strongly recommended [9†L18-L19].