Psa+interface+checker+440+2021 May 2026

Ensure that the are correctly installed in your Device Manager before running the checker. If the PC sees the device as "Unknown," the checker will not function.

PSA Interface Checker 4.4.0 (2021) is a specialized diagnostic utility used by Peugeot and Citroën (PSA Group) technicians and DIY enthusiasts. It is designed to verify the firmware version of Diagbox interfaces and ensure compatibility between the hardware (Lexia 3 / XS Evolution) and the software (Diagbox). 🛠️ What is PSA Interface Checker 4.4.0?

The Interface Checker is a standalone tool that "pings" your diagnostic VCI (Vehicle Communication Interface). It serves as a bridge between the physical hardware plugged into your car and the Diagbox software running on your laptop. psa+interface+checker+440+2021

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.

Allows users to manually upgrade or downgrade the firmware to match specific Diagbox software requirements. Ensure that the are correctly installed in your

Determines if your interface is "Evolution" (full chip) or a "Lite" version.

Click "Version" to see your current firmware. It is designed to verify the firmware version

Displays the serial number and reference (9780.Z5) to confirm if the device is recognized as a genuine or high-quality clone. ⚡ Why Use the 2021 Update?

The "4.4.0" version released around 2021 was specifically tailored to handle newer firmware updates required for Diagbox versions 9.xx and above. 🔍 Key Features and Functions

If you're working on a specific car, I can provide more tailored advice. Let me know: What is the vehicle? Which version of Diagbox are you trying to run? Is your interface a Full Chip or a standard clone ?