If you connect to a vehicle and the diagnostic scan returns "ECU not recognised" for the engine or other control units, the issue is software compatibility.

DiagBox is PSA’s dealer-level diagnostic software. Version 7.57 specifically:

A VMware prompt will appear asking where to connect the device. Select and choose your Diagbox VM. Within the Windows 7 VM, open Device Manager .

is the official diagnostic software for PSA Peugeot Citroën Group. It includes both Lexia 3 (for Citroën) and PP2000 (for Peugeot).

Disclaimer: Automotive diagnostics require care. Incorrect coding can damage vehicle modules.

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