By using the long-press shortcut on the , users can bring up a hidden text box designed for entering specific diagnostic "cheat codes". These codes prompt the system to run immediate hardware scripts or display system variables. Secret Code System Command Action Function Description ##837## DISPLAY_VER_TYPE
Next time your Bluetooth acts up, or you simply want to check if your car's software is running the latest build, skip the trip to the mechanic and use these simple button holds to unlock the hidden side of your Peugeot 308.
Exiting is simple. You don't need a secret handshake.
Enables an background system spy trace program that monitors background hardware performance errors. SPY_DIS peugeot 308 secret menu
This report details the procedures required to access the "Secret Menu" (Engineering Mode/Diagnostic Mode) on the Peugeot 308. This menu provides access to vehicle system status, sensor diagnostics, screen calibration, and configuration settings not available through the standard user interface. Access methods vary significantly depending on the vehicle's infotainment generation.
To access the "secret" or hidden menus on a Peugeot 308 , you typically need to use specific button combinations or "cheat codes" on the infotainment system. These menus are often used by technicians to view detailed system logs, GPS data, or software versions. Expert/Spy Mode (NAC/RCC Systems):
Note: exact button sequences vary by year and infotainment generation (e.g., SMEG/RT6, SMEG+, MirrorScreen/Android Auto-capable units). The sequences below are widely reported, but may differ by model year. By using the long-press shortcut on the ,
Release and immediately press the "Nav" button for another 5 seconds.
These menus are intended for diagnostic purposes. Changing settings within these "expert" modes can occasionally lead to system instability or accidental data deletion.
The secret menu is a diagnostic tool, not an customization panel. Exiting is simple
Modern cars are essentially computers on wheels, and the Peugeot 308 is no exception. Beyond the standard touchscreen options visible during your daily drive lies a hidden layer of software: the Peugeot 308 secret menu. Often referred to by technicians as the expert mode, engineering menu, or cheat code system, this hidden interface allows you to view raw diagnostic data, test hardware components, and check precise system versions without a mechanic's OBD2 scanner.
Ever wondered if the car’s cabin sensor is accurate? Here’s how to see the raw data.
Here are the precise instructions to unlock it, depending on the generation of your vehicle: 🎵 The "Piano Key" Method (Gen 2 / SMEG & RCC Systems)
It is generally accessed within the infotainment screen (SMEG, SMEG+, or NAC systems) and provides data that is otherwise invisible on the normal dashboard or infotainment display. How to Access the Secret Menu on Peugeot 308 (SMEG System)