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.
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. peugeot 308 secret menu
However, if you are looking to unlock "hidden horsepower" or video playback while driving, you will be disappointed. This is not a hack; it is a hospital for your car's computer. In this article, we will walk you through
Before you poke around, take a photo of your screen's current settings. If you accidentally change a value, you can set it back to what it was. In the automotive world, this is often referred
Car enthusiasts and technicians call this the —also known as the Dealer Diagnostic Menu or Engineering Mode.
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).
If your Peugeot 308’s screen freezes, your radio loses stations, or your reverse camera is intermittent, the secret menu is the first place you should go. It will tell you immediately if the problem is a loose wire (signal drops to zero) or a software glitch (RAM value maxed out).