Peugeot 308 Secret Menu [2021] — Premium

Found on facelifted Peugeot 308 models from late 2017 up through newer generations.

Unlocks the hardware testing grid (screen colors, button responses).

With the ignition off, press and hold the button at the end of the (left side). 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.

the button firmly for approximately 5 to 10 seconds. Found on facelifted Peugeot 308 models from late

The secret menu is better for infotainment and electrical problems. OBD2 is better for engine and safety system faults. Use both.

Advanced Bluetooth debugging if pairing issues occur. This report details the procedures required to access

Method 2: The RCC and NAC Systems (Second Generation, 2017–2021)