The PSA Interface Checker is a dedicated software utility designed to verify and manage the firmware of PSA diagnostic interfaces, commonly known as Lexia or PP2000 interfaces. These interfaces serve as the bridge between a Windows-based computer running DiagBox software and the vehicle’s onboard diagnostic systems.
After activation, examine the displayed information carefully. The serial number should show as either 921815C or 963830C. If it shows as 963830B, the interface is not a full chip unit and will likely have limited functionality with DiagBox. The firmware version should match the requirements of the DiagBox software you intend to use. psa interface checker 440 verified