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.
If you own a Peugeot 308 (especially the second-generation T9 or the new third-generation P5), you are likely familiar with its sleek i-Cockpit, small steering wheel, and crisp touchscreen interface. But what if we told you that your car is hiding an entire layer of functionality beneath its glossy surface—a collection of diagnostics, override settings, and legacy features commonly referred to as the Peugeot 308 secret menu ?
Start with the to check your camera quality. Move on to the climate sensor display to understand how your AC performs. And always keep the BSI reset procedure in your glovebox for electrical gremlins.
Tinkering with these menus may alter vehicle settings. Always note your original configuration before making changes. Some functions are for professional use only. Part 1: The Infotainment Secret Menu (SMEG+ & NAC Systems) Most modern Peugeot 308s (2014–2021) use either the SMEG+ (entry-level) or NAC (Connected Navigation) head unit. The newest 308 (2022+) runs on the i-Connect Advanced system. Each has its own hidden portal. 1.1 How to Access the “Engineer Menu” (NAC/Wave 2) This is the holy grail for Peugeot enthusiasts. It allows you to see GPS satellites, raw speed data, battery voltage, and even update the firmware manually.
This gets hot. Only do this in a well-ventilated area away from flammable materials.
Automotive forums are buzzing with rumors of hidden “engineer menus,” “test codes,” and “unlocked profiles.” Some of these are useful; others are just cool party tricks. In this comprehensive guide, we will unlock every known secret menu for the Peugeot 308, covering the infotainment system, the instrument cluster, and the climate control unit.
Have you discovered a Peugeot 308 secret we missed? Join the discussion on Peugeot forums using the hashtag #308SecretMenu.
