The Smeg system is the most common interface for the second-generation 308. To access the hidden service data: Turn on the ignition or start the engine.

Changing the vehicle's "Configuration" file (e.g., telling the car it has a power tailgate when it does not) will throw permanent error codes that require a dealer-level Diagbox tool to clear.

There are two primary methods used to access hidden menus on the Peugeot 308, depending on the model year and installed audio system.

for about 5 to 10 seconds.

To access the secret menu on a Peugeot 308, follow these steps: