PSA Interface Checker 4.4.0 is a utility for managing the firmware of Lexia-3 (VCI) diagnostic adapters used for Peugeot and Citroën vehicles, allowing users to identify, update, or downgrade the firmware. The software enables manual firmware flashing and checks for proper communication, which is crucial for troubleshooting connection issues with Diagbox, Lexia-3, or PP2000 software. For more details, visit French Car Forum PSA Interface Checker and Lexia Version - French Car Forum
| Feature | PSA Interface Checker 4.4.0 | DiagBox 9.x / PP2000 | | :--- | :--- | :--- | | | Verify hardware/drivers | Read/clear faults, program keys, actuate tests | | Cost | Free | Licensed (~$100-$1000) | | Repair Functionality | None | Full | | ECU Flashing | No | Yes | | Speed | Instant | Slow to launch | | Best For | Troubleshooting "No connection" errors | Complete diagnostics | psa interface checker 4.4.0
0403 (FTDI)6001 (Standard VCI)
Then, in the VM, run 4.4.0 to confirm that the USB device is not being captured by the host OS.You are attempting to upgrade a "Revision B" clone to a "Revision C" to unlock functions for newer car models like the Peugeot 308 or Citroen C5. Usage Steps Connect Device: PSA Interface Checker 4