: Often used to view specific diagnostic screens after an initial code has been entered. Available Information Once inside, the menu typically allows you to view: System Information : Exact firmware and map versions.
Newer models utilize Continental NAC (with navigation) or RCC (without navigation) systems. Turn the ignition to the "On" position.
Whether you drive an early model or a second-generation (T9) variant with the SMEG or NAC touchscreen, these hidden engineering screens allow you to monitor GPS satellites, verify exact firmware versions, and run system tests without specialized OBD2 scanners.
For later models equipped with NAC or RCC infotainment, the secret menu is called "Engineering Mode." peugeot 308 secret menu
Release the button when the display shifts to the . 2. NAC & RCC Systems (Typically 2017–Present) SMEG navigation hidden menu in Citroen and Peugeot
The secret menu is a built-in engineering screen. It is also known as the "Expert Menu" or "Cheat Codes" screen. Peugeot technicians use this menu to troubleshoot infotainment issues without using external diagnostic tools. Why Access It?
The secret menu is a built-in diagnostic interface embedded within the car's infotainment system (such as the RT6, SMEG, SMEG+, or NAC units). Manufacturers include these hidden screens so factory workers and dealership technicians can quickly verify that the screen, GPS, radio buttons, and internal computer systems are functioning perfectly before the car leaves the garage. : Often used to view specific diagnostic screens
button for several seconds while the ignition is on until the service menu appears. Expert Mode : On some versions, holding the
If you’re ever unsure, the Peugeot 308 owner's manual remains your primary and safest guide for all vehicle functions. It's always best to consult the official documentation before attempting any advanced procedures, as firmware and access codes can change between model years and regions.
Locate the button (or the gear icon/src button depending on the exact dash configuration). Press and hold the button continuously for 5 to 10 seconds. Turn the ignition to the "On" position
: Changing calibration files can brick the infotainment system.
Locate the (Source) button or the Settings gear icon on the dashboard fascia.
Software versions, map versions, GPS signal strength, and navigation demo mode. For NAC Systems (Newer Models)
The steps to access these menus can vary based on your specific .