diagnostic tool for Peugeot or Citroën vehicles. This small utility is essential for checking if your device is a "Revision B" or "Revision C" and for updating or downgrading its firmware to make it compatible with different versions of Where to Download

is often bundled with "Lexia_flash" or "vci_updater" archives. Quick Start Guide: How to Use It

⚠️ Many websites offering a "PSA Interface Checker download" bundle malware or adware. Always source from reputable automotive forums or the official DiagBox installation disc.