Psa Interface Checker V3 Download Link May 2026

PSA Interface Checker V3

The is a utility tool used to manage the firmware of PSA XS Evolution (Lexia 3) diagnostic interfaces , which are used for Citroën, Peugeot, and DS vehicles. Its primary function is to identify the hardware revision of your device (Revision B or C) and manually update or downgrade its firmware to ensure compatibility with different versions of Diagbox software. Key Features

Cause:

Missing Visual C++ Redistributables. Fix: Install both x86 and x64 versions of VC++ 2015-2022 from Microsoft. Psa Interface Checker V3 Download

Part 1: What is PSA Interface Checker V3?

1. Always run the Checker before launching DiagBox. This ensures no pending driver conflicts.
2. Keep a copy on a USB stick. If you reinstall Windows, the Checker is your fastest way to test the interface without reinstalling the entire DiagBox suite.
3. Do not use with the car running. The Checker sends pings that can interfere with CAN traffic. Ignition ON, engine OFF.
4. Update the Checker itself. V3.1.2 is the latest stable; V3.0 had bugs detecting 2021+ models.

1. Launch the application.
2. Select the COM port or USB channel assigned to your VCI (use Windows Device Manager if unsure).
3. Choose vehicle family (e.g., Peugeot 308 T9, Citroën C4 Picasso).
4. Click “Verify Interface”.
5. Review the output: