The is a testament to the engineering depth hidden in modern French cars. From real-time sensor data to forced component tests, these codes transform your compact hatchback into a rolling diagnostic lab.

Displays the precise coordinates of the vehicle alongside a real-time signal strength counter showing the active satellite count. This helps diagnose broken or failing dash GPS antennas.

While it won't completely replace a dedicated OBD2 engine code reader, the secret menu displays communication errors between the screen, the radio module, and the central BSI (Body Systems Interface) computer. Safety and Risks: A Word of Caution

To access the "secret" or hidden menus on a Peugeot 308 , the method depends on whether your car has the older system (typically 2013–2017) or the newer NAC system (2017 onwards) . 🛠️ How to Access Hidden Menus For SMEG Systems (Older Models) Turn on the ignition and wait for the system to boot up. Press and hold the MENU button for about 5–10 seconds.

Remember: With great hidden menus comes great responsibility. Never change a setting you don’t understand, and always document the original state. Now go impress your fellow Peugeot owners—just don’t expect the dealer to applaud you for it.

For those advanced modifications, you will need to bypass the screen altogether:

The secret menu, also known as the "diagnostic menu" or "service menu," is a hidden menu that provides access to advanced settings and features not available through the standard infotainment system. It allows drivers to customize their driving experience, monitor vehicle performance, and even diagnose issues.