Peugeot 308 Secret Menu -

Car enthusiasts and technicians call this the —also known as the Dealer Diagnostic Menu or Engineering Mode.

In the automotive world, this is often referred to as the or "System Information Menu." On the Peugeot 308, it resides within the SMEG or NAC/Wave 4 infotainment systems.

If you own a Peugeot 308 (particularly the second generation, 2013–2021, or the latest 2021+ model), you might feel like you know your car inside out. You adjust the climate control, pair your phone via Bluetooth, and check your fuel economy. But what if we told you that hidden just beneath the surface of your infotainment screen lies a treasure trove of diagnostic data, hardware tests, and configuration options? peugeot 308 secret menu

Accessing this hidden world doesn't require a $5,000 diagnostic computer. You can do it from your driver’s seat in under 60 seconds. But before you start tapping away, you need to know what you are looking for and, more importantly, which buttons not to press.

| Feature | OBD2 Scanner (ELM327) | Peugeot 308 Secret Menu | | :--- | :--- | :--- | | Engine Fault Codes | Yes | Yes (Basic) | | ABS / Airbag Codes | Expensive models only | No (Menu only shows infotainment/BSI) | | | No | Yes | | GPS Signal Strength | No | Yes | | Radio Antenna Test | No | Yes | | Real-Time Battery Voltage | Yes (with ignition on) | Yes (with ignition off) | Car enthusiasts and technicians call this the —also

Now, go ahead. Tap the settings button, hold down the music note, and discover exactly what your Peugeot 308 is thinking. Just remember: with great power comes great electrical responsibility. Have you found a different combination that works on your Peugeot 308? Let us know in the comments below. Drive safe.

In this article, we will walk you through exactly how to unlock the Peugeot 308 secret menu, what you will find inside, and how to use it to diagnose faults, test your hardware, and even tweak hidden vehicle settings. The secret menu is a low-level diagnostic interface built into your infotainment system. It is primarily used by engineers during production and by dealership technicians to quickly verify system health. You adjust the climate control, pair your phone

The secret menu is better for infotainment and electrical problems. OBD2 is better for engine and safety system faults. Use both. The "Secret Menu" on the All-New 2023+ Peugeot 308 The newest Peugeot 308 with the i-Connect Advanced system is more locked down. Peugeot has hidden the engineering menu deeper due to cybersecurity concerns (GDPR and UN R155 vehicle regulations).