If you own or service Peugeot, Citroën, or DS automobiles, you know that accurate diagnostics require specialized tools. The is a critical software utility used by mechanics and DIY enthusiasts to manage, verify, and update the firmware of Lexia 3 (PP2000) and Diagbox hardware interfaces.
: Plug your Lexia 3 interface into your PC via the USB cable. Do not connect it to the car yet.
PSA Interface Checker 4.4.0 is a utility program used to manage and update the firmware of the Lexia 3 (VCI) diagnostic interface
: Standard interfaces may only work reliably with Diagbox version 5.29 or lower unless updated to a newer firmware revision via tools compatible with the Interface Checker results. psa interface checker 4.4.0
: Allows the user to choose a specific firmware file (usually named appli.com or vci_updater.com ) from the software directory.
Select the firmware version required by your specific Diagbox build.
The PSA Interface Checker is a lightweight tool designed to communicate directly with the VCI hardware. While handles vehicle diagnostics (reading codes, live data, programming), the Interface Checker ensures the hardware itself is running the correct firmware version to be compatible with that software. If you own or service Peugeot, Citroën, or
Run "PSA Interface Checker Install.exe." This typically creates three icons on your desktop, including the checker itself.
Launch the PSAXSChk.exe application. Ensure your Lexia 3 device is plugged into a high-speed USB port. Step 2: Detect Your Interface
The checker allows you to re-flash the interface firmware (e.g., updating to 4.3.0/4.3.2) to ensure stability and compatibility. Do not connect it to the car yet
Follow these steps to safely check or update your hardware interface. 1. Preparation Disconnect your laptop from the internet. Disable any aggressive third-party antivirus software.
Version 4.4.0 refined how exemptions are processed. The interface checker validates exemptions for specific users, runtime classes, or namespaces, ensuring that critical system pods (like CNI plugins or kube-proxy) are not accidentally blocked by strict PSA policies.
Click Version or Reference to see the current serial number and firmware status.
Plug your Evolution/Lexia interface into a USB port on your computer. Do connect the tool to the vehicle's OBD2 port yet. Step 2: Running the Tool