Actia Psa Interface Driver -

DiagBox and PP2000 are notoriously picky about COM port numbers. They typically only scan COM1 through COM4.

Cause: Core Isolation / Memory Integrity blocks unsigned drivers.
Fix: Search "Core Isolation" in Windows > Turn Off "Memory Integrity." Then reinstall the driver using the unsigned driver method above. actia psa interface driver

Installing the Actia PSA interface driver can be tricky due to Microsoft’s driver signature enforcement. Follow these steps meticulously. DiagBox and PP2000 are notoriously picky about COM

If you’re using an ACTIA PSA XS (or Pass-Thru) interface to diagnose Peugeot, Citroën, DS, or Opel vehicles, installing the correct driver is essential. Without it, your PC won’t recognize the interface, and diagnostic software (like DiagBox, PP2000, or Lexia) won’t communicate with the vehicle. In Device Manager, you should see:

| Symptom | Likely cause | Fix | |---------|--------------|-----| | Driver installs but DiagBox says “No VCI detected” | Wrong VID/PID in driver INF | Edit actiapsa.inf – change VID_0403 to VID_0BDA (or vice versa) depending on your clone | | Device shows “FTDI” or “USB Serial Converter” | Driver not replaced | Manually force update using actiapsa.inf | | Blue screen on connect | Conflicting older drivers | Uninstall all FTDI/VCP drivers, clean registry with DriverStore Explorer | | Windows 11 refuses to load driver | Signature enforcement too strict | Use test mode: bcdedit /set testsigning on + reboot |

In Device Manager, you should see: