Absolutely. Even though the version is tagged "2021", it remains the baseline for:
PSA Interface Checker is a specialized utility tool used by owners of PSA (Peugeot/Citroën) diagnostic hardware, specifically the Lexia-3 (VCI) interface. It is not a diagnostic tool for reading car codes itself, but rather a "firmware manager" for the physical connector that links your laptop to the car. Review: PSA Interface Checker (4.4.0 / 2021 context) For enthusiasts and mechanics using psa+interface+checker+440+2021
Identifies various J2534-compatible interfaces, including Actia XS Evolution, Xhorse MVCI, and VAS 6154. Absolutely
The is a specialized software utility designed to validate the communication link between a third-party or OEM diagnostic interface (commonly a VCI – Vehicle Communication Interface) and PSA vehicles. The "440" designation typically refers to a specific hardware compatibility layer or driver set, while "2021" indicates the version release that incorporates updates for vehicles manufactured up to that year. Review: PSA Interface Checker (4
In the context of 2021 updates, "440" often refers to a specific firmware revision or hardware ID compatibility required to run modern iterations of Diagbox. Compatibility
: Connect the Lexia 3 interface to the PC via USB before launching the application.
Modern PSA platforms limit one set of credentials to a single active session. If an admin logs into the same service account via a UI while the interface checker is running, the checker’s session is invalidated → error 440.