Psa Interface Checker 440 Link ((free)) Jun 2026

psa-interface-checker --check-all --output json | jq '.[] | select(.status == "440")'

When this vital connection fails, the Interface Checker will often drop a communication error or throw an status code. The root causes typically boil down to three main system conflicts: 1. The USB Driver Protocol Failure

Because the original software can be difficult to find on official sites due to its specialized nature, users rely on community-shared resources. Here is how to get it and what to look for.

| Interface Firmware Version | Compatible DiagBox Software Version(s) | | :--- | :--- | | 4.3.2 | DiagBox 7.57 | | 4.3.4 | DiagBox 7.67 & 8.02 | | 4.3.7 | DiagBox 9.68 | | 4.4.0 | DiagBox 9.91 through to 9.149 | psa interface checker 440 link

DiagBox (v7.xx through v9.xx), PP2000, and Lexia 3 standalone apps. Firmware directory: C:\APPLIC\LEXIA\MajAppCom\ . Critical Config File Mod

If you are looking for the download for the checker software:

is a diagnostic utility used specifically for Lexia 3 (XS Evolution) interfaces. These interfaces are USB-to-OBDII bridges that allow Peugeot and Citroen cars to communicate with PC software, primarily Diagbox . psa-interface-checker --check-all --output json | jq '

18;write_to_target_document7;default0;a1;0;a1;18;write_to_target_document1a;_OYrsaY_qMbeYseMPlaCT-Qc_20;a3; 0;f5;0;193;

curl -X POST https://psa.internal/callback/440/resolve \ -H "Content-Type: application/json" \ -d '"transactionId":"chk_440_001","finalStatus":"SUCCESS"'

You can securely download the verified executable file via this PSA Interface Checker 4.4.0 Download Link. Host OS and Driver Environment Here is how to get it and what to look for

Click and choose the 4.4.0.bin firmware file (this file is usually found in the APPLI folder within the tool's directory or the Diagbox installation directory). Click "Update" .

While official links from the manufacturer (Actia) are generally restricted to authorized dealers, community-maintained versions and instructions are frequently hosted on automotive forums: Usage Instructions:

Typically, the tool is hosted on the official manufacturer's technical support site (e.g., Roche, Siemens, Beckman Coulter).

Using this checker application provides a direct path to bypass automated platform blockers and lock the interface at a stable firmware state. Deciphering the Hardware: Revision B vs. Revision C

When you install newer iterations of the Diagbox suite, the application will frequently attempt to push a silent, automated firmware update to the connected VCI over the USB line. While original dealer-grade VCIs manage this seamlessly, automated updates can corrupt or block aftermarket clones (especially those missing a "Full Chip" circuit layout).