Because many Actia diagnostic tools operate via cloned hardware or legacy software, Windows 10 and Windows 11 often block driver installation due to missing digital signatures. Follow these steps for a clean installation.
ACTIA PSA XS Evolution (and its successor, the ACTIA Core PSA
The Actia PSA interface driver is a specialized software component that enables communication between vehicle diagnostic applications and electronic control units (ECUs) on PSA Group vehicles (Peugeot, Citroën, and related Stellantis platforms) via Actia-branded hardware interfaces. Actia, a manufacturer of automotive diagnostic tools, produces interfaces that connect to a vehicle’s diagnostic port (typically OBD-II) and present a transport layer—USB, serial, or network—through which diagnostic commands and data can be exchanged. The driver implements the low-level protocols, device enumeration, and data framing required for higher-level diagnostic software (such as workshop tools, service applications, or aftermarket scan tools) to interrogate ECUs, read and clear fault codes, view live sensor data, and perform service functions. actia psa interface driver
Prevents timing errors caused by modern USB 3.0/3.1 controllers. Ensures your hardware talks to newer DiagBox v9 releases. Disable Antivirus During Setup Prevents false-positive blocks on vital driver .sys files.
Required for modern DiagBox versions (V7.xx, V8.xx, and V9.xx). Running 64-bit systems requires signed drivers or disabling Driver Signature Enforcement. Step-by-Step Driver Installation Guide Because many Actia diagnostic tools operate via cloned
Launch the utility (often bundled with your diagnostic software download). Click on Activate . Click Version .
| | Likely Cause | Solution | | :--- | :--- | :--- | | Interface not recognized in Device Manager | Driver not installed, damaged USB cable (try the short cable), or faulty USB port | Try a different USB port (preferably 2.0). Check cable integrity. Use Device Manager to scan for hardware changes. | | Yellow exclamation mark next to ACTIA USB | Corrupted driver, or the loaded driver is incompatible (e.g., driver ending in 22.inf when 19.inf is needed) | Manual Update: In Device Manager, right-click the device → Update driver → Browse my computer → Let me pick . Choose the .inf that doesn't cause a yellow mark. | | Interface recognized, but no car communication | Faulty OBDII connector pins (4,5,6,7,14), missing vehicle power on OBD pin 16 (blown lighter fuse), or incorrect firmware version | Check vehicle fuses. Test with PSA Interface Checker . If serial ends with /B , the interface may be blacklisted for newer DiagBox versions. | | Green LED flashes once then turns off | Power issue from USB port or defective VCI. Also, the VCI may be detecting a short on the vehicle OBD bus | Connect the VCI to a different PC that does not have DiagBox installed. If the green light stays on there, the driver on the original PC is flawed. | | Error after Windows 10/11 update | Windows Update replaced a critical driver component (like an FTDI driver), breaking communication | Go to Settings → Windows Update → Update history → Uninstall updates . Roll back the problematic update. Or, uninstall and reinstall the DiagBox driver package. | | Error related to VMware or VirtualBox | The virtual machine has not been given direct access to the USB device connected to the host PC | In the virtual machine software, go to USB settings (or Devices → USB in VMware). Check the box for the "Actia PSA XS Evolution VCI" to mount it directly into the virtual environment. | | INIT KO message in Interface Checker | The VCI is completely non-responsive or bricked, often due to a failed firmware update | No standard software fix. This typically indicates a hardware failure within the VCI itself. | Ensures your hardware talks to newer DiagBox v9 releases
If you run Diagbox natively on your main laptop, Windows Update will occasionally overwrite the working Actia driver with a generic USB driver, breaking vehicle communication.
is the gold standard for stability with these drivers.