The is a essential utility for technicians working with PSA Group vehicles (Peugeot, Citroen, DS, and Opel/Vauxhall). It is used to identify, verify, and update the firmware of the Lexia 3 VCI (Vehicle Communication Interface) to ensure compatibility with various versions of DiagBox software. Key Functions & Version 4.4.0
Allows users to manually upgrade or downgrade the firmware to match specific Diagbox software requirements.
According to community reports, version 4.4.0 is also the that works reliably with both clone interfaces and genuine Actia units, making it the preferred baseline for most home mechanics and independent workshops.
Initiate the diagnostic test. The tool will likely scan the selected interface and report any issues it finds. psa+interface+checker+440+2021
As with any software tool used in a professional environment, especially one that updates hardware, be aware that the use, distribution, and modification of automotive diagnostic software are subject to the intellectual property rights of the original manufacturer, Stellantis (formerly PSA Group).
Свистопляска с Лексией. — Peugeot Bipper дизель ... - Drive2
Identifying if a device is Revision B or Revision C (Full Chip). The is a essential utility for technicians working
It represents a pivotal moment in the DIY automotive diagnostic scene. It was the battle cry of home mechanics who refused to be locked out of their own vehicles. For a period centered around 2021, was the only way to run the most advanced dealer-level software, and the PSA Interface Checker was the only tool capable of safely installing it.
Click "Initialize" or "Read" to see your device details.
| Serial Number | Interface Type | DiagBox Compatibility | |---|---|---| | 921815C | Full chip (Revision C) | Compatible with all modern DiagBox versions | | 963830C | Full chip (Revision C) — already flashed | Works correctly with modern DiagBox versions | | 963830 B | Non-full chip (Revision B) | Limited to DiagBox versions up to 5.29 | According to community reports, version 4
Plug your Lexia 3 interface into your PC via USB (no need to connect to the car yet). Run as Admin: Open the psa_checker.exe as an administrator.
The application will display the active driver, hardware series number, and current application version.
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: Used to "unblock" or reflash interfaces that have been blacklisted by newer software versions or failed updates. Usage Context PSA interface differences - CarTechnoloGY