Once the interface is connected, start the Diagbox icon. The system will ask you to select the car manufacturer. Select Peugeot, Citroën, or DS.

Diagbox 9.96 is an advanced version of the proprietary diagnostic software used by PSA (PSA Peugeot Citroën) dealerships. This specific version is highly sought after because it operates as a standalone, pre-activated software package. Unlike newer online-only versions that require expensive official brand subscriptions, version 9.96 allows comprehensive offline diagnostics.