Psa Interface Checker 4.4.0 ((full)) Jun 2026

Right-click PSA_Interface_Checker_4.4.0_Setup.exe → Run as Administrator. Accept the license agreement.

Version 4.4.0 remains a staple for many DIY mechanics. While Diagbox often attempts to update firmware automatically during installation, manual updates via the Interface Checker are frequently necessary when using "cloned" VCI hardware or when Diagbox fails to recognize the device. psa interface checker 4.4.0