Peugeot 308 Secret Menu • Ad-Free

Each of these systems has different access points for their respective hidden menus.

for approximately 5–10 seconds.

Dialing out resonant frequencies in aftermarket speakers or fine-tuning the stock system for high-resolution audio. peugeot 308 secret menu

Standard users get a basic bass/treble slider. The secret menu reveals a 7-band parametric equalizer.

Unlocking the Vehicle Interface: A Technical Analysis of the Peugeot 308 Hidden Diagnostic Menu Each of these systems has different access points

If you are looking for simple car health data rather than system engineering settings, Peugeot provides a basic, built-in diagnostic tool accessible through the standard menu.

You can run RGB color tests to identify dead pixels on the display. Audio tests allow you to isolate individual speakers to verify that the factory amplifier is routing signals correctly. Important Safety Warning Standard users get a basic bass/treble slider

: Enters "Spy Mode" or "Expert Mode," which displays various system logs, hardware versions, and software details.

In the automotive world, this is often referred to as the or "System Information Menu." On the Peugeot 308, it resides within the SMEG or NAC/Wave 4 infotainment systems.

If your Peugeot 308 prompts you for a specific code after holding down the settings button, you can use these well-documented enthusiast codes to unlock hidden functions: Opens the advanced hardware diagnostic page.