Peugeot 308 Secret Menu ((full)) -
Peugeot 308 Secret Menu: Hidden Features, Diagnostic Modes, and Easter Eggs You Never Knew Existed
Note:
Some versions require a second confirmation code, usually 1122 , after entering your primary choice. 🔑 Common Cheat Codes (NAC System)
- Plug an ELM327 or Bluetooth/Wi‑Fi OBD-II adapter into the OBD port (usually under dash left of steering column).
- Connect with an app (e.g., Torque, OBD Auto Doctor, Forscan for compatible ECUs).
- Read/clear DTCs, view live parameters (fuel trim, lambda, injector timing), and access advanced modules.
- Instrument cluster service menu (common method)
- Start the engine (or put ignition on).
- Press and hold the Phone button (on the steering wheel or the dedicated button near the screen) for approximately 15 seconds.
- While still holding the Phone button, press the Menu button on the screen bezel 3 times rapidly.
- Release the Phone button.
Press the Start/Stop button once without touching the pedals to power the dash. peugeot 308 secret menu
- Peugeot 308 (T9) – 2013 to 2021: Uses SMEG+ or NAC systems. The secret menu is fully accessible.
- Peugeot 308 (P5) – 2021 to Present: Uses the latest i-Cockpit with Wave 4 infotainment. A modified version of the secret menu exists.
- Older models (2007–2013 – T7): These often have a different RD4 or RT4 system. The secret menu is accessed via the radio panel buttons (hold "Menu" + "OK"), not the touchscreen.
The "secret menu" of the Peugeot 308 represents a necessary bridge between the consumer-facing software and the engineering requirements of the vehicle. While PSA/Stellantis designs these interfaces to be hidden, their discovery by the enthusiast community provides a valuable tool for diagnostics and hardware maintenance. As vehicles become increasingly software-defined, the accessibility of such menus continues to shrink in favor of cloud-based diagnostics, making the documentation of these legacy access methods vital for the longevity of vehicles like the Peugeot 308. Peugeot 308 Secret Menu: Hidden Features, Diagnostic Modes,
A mode used by dealerships to cycle through features for display. Peugeot France Peugeot 308 Overview & Tech Review Plug an ELM327 or Bluetooth/Wi‑Fi OBD-II adapter into