Peugeot 308 Secret Menu

Peugeot 308 Secret Menu: Hidden Features, Diagnostic Modes, and Easter Eggs You Never Knew Existed

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?

Authentication: A keyboard will pop up on the touchscreen asking for a four-digit code. Common Codes: peugeot 308 secret menu

4.3 Alternative Method (For some early T9 models)

• Navigate to the radio/media source screen.
• Press and hold the "Radio" physical button.
• While holding, press the "Phone" button 3 times.
• Release both.

3. Access Procedures

There are two primary methods used to access hidden menus on the Peugeot 308, depending on the model year and installed audio system. Peugeot 308 Secret Menu: Hidden Features, Diagnostic Modes,

2. Audio System Tests

• Speaker actuator: Tests each speaker (Front Left, Front Right, Rear Left, Rear Right, Center/Subwoofer) individually.
• Fader/Balance lock: Forces the audio to a specific channel to diagnose buzzing or silence.
• EQ curve display: Shows the current equalizer response in real time.

the physical "MENU" or "SRC" button (usually for 5–10 seconds). Navigate to the radio/media source screen

Use dealer-level diagnostic software like DiagBox or PP2000 to rewrite parameters and activate hidden native vehicle features safely.

What Can You Do in the Peugeot 308 Secret Menu?