Peugeot 308 Secret — Menu

On later iterations of the Peugeot 308 featuring piano-key style physical toggle buttons below the screen, the method requires a passcode:

Whether you drive an early model or a second-generation (T9) variant with the SMEG or NAC touchscreen, these hidden engineering screens allow you to monitor GPS satellites, verify exact firmware versions, and run system tests without specialized OBD2 scanners.

Connect a laptop utilizing a cloned Lexia 3 cable or a compatible wireless OBD2 interface. peugeot 308 secret menu

This interface is technically termed "Spy Mode" or "Engineering Mode" because it is meant solely for factory line workers and diagnostic technicians.

This will trigger the "Expert Mode" or "Spy Mode," showcasing advanced internal logs and system parameters. What Can You Do in the Peugeot 308 Secret Menu? On later iterations of the Peugeot 308 featuring

Test display colors, screen response, and audio output channels directly through mapped engineering tests.

Use dealer-level diagnostic software like or PP2000 to rewrite parameters and activate hidden native vehicle features safely. This will trigger the "Expert Mode" or "Spy

Instantly check your software build numbers to see if you are eligible for dealer firmware updates or TomTom map refreshes.