308 Secret Menu: Peugeot

While exploring the hidden menus is highly informative, you must exercise caution.

When you first turn the key, you see the Peugeot lion and then your speed. But there is a hidden self-test mode.

Depending on your model and infotainment system, the "secret handshake" varies. Here is how to get in: SMEG / SMEG+ Systems (Common in 2013-2017 models): Turn on the ignition and wait for the system to load. Press and hold

Quick verification that every single pixel and LED in your cluster is working. Useful when buying a used Peugeot 308. peugeot 308 secret menu

This paper focuses on the , as it contains the most extensive hidden data.

| Menu Name | Information Provided | |-----------|----------------------| | | Live CAN bus data: coolant temperature (in °C), battery voltage, fuel pressure, instantaneous fuel consumption (digital). | | GPS Info | Number of satellites in view, HDOP (horizontal dilution of precision), latitude/longitude, GPS time. | | Screen / Display Tests | LCD color bars, dead pixel detection, backlight test, touchscreen crosshair calibration. | | Audio Test | Speaker phase, left/right/fader balance test tones, amplifier status. | | Version Information | Exact part numbers, hardware revision, software version, map version (for navigation units), Bluetooth stack version. | | ECU List | List of all electronic control units (BSI, ABS, BSI, etc.) and their communication status (OK/NO COMM). | | Vehicle VIN | Displays the stored VIN – useful for verifying configuration. |

Accessing these hidden developer screens allows you to troubleshoot electronic glitches, check firmware versions, and view raw sensor data without buying an expensive OBD2 scanner. What is the Peugeot 308 Secret Menu? While exploring the hidden menus is highly informative,

The "secret menu" in a Peugeot 308 (often referred to as the or Service Menu ) is a hidden diagnostic tool used by technicians to check software versions, hardware serial numbers, and system temperatures. Depending on your car's generation (T7 vs. T9) and infotainment system (SMEG, NAC, or RCC), the way to access it varies. How to Access the Hidden Menus

: Release the button immediately after hearing a distinct system beep or seeing the screen transition into a blue or grey engineering menu page.

: For layouts with specific console buttons, hold the Navigation or Music button down for roughly 10 seconds. Depending on your model and infotainment system, the

For the newest Peugeot 308 models (2021+), much of the "hidden" feel is now integrated into . You can customize these digital sliders by pressing and holding the central screen to enter a layout mode where you can drag and drop functions for quick access.

Monitor the temperature of the head unit to diagnose screen flickering or crashes.

A keypad will appear on the screen asking for a password. Enter one of these functional codes:

While the menu is "read-only" regarding critical engine mapping, improper use can lead to system instability.

: The screen will briefly flash or click over, presenting the hidden Service Menu containing raw module logs. 2. The NAC / RCC System (Modern Generations & i-Cockpit)