Accessible on certain firmware versions to toggle minor software flags. 1234 or 0000

If your smartphone frequently disconnects, enter code . This screen monitors the real-time USB bus voltage and Bluetooth signal drops, helping you determine if the issue is a faulty cable or an internal system glitch. 2. Checking System Temperatures

This menu typically includes detailed software and map version information.

This is an interesting request, but it comes with a .

Accessing the menu requires a specific code based on your vehicle's infotainment hardware:

Displays raw satellite data, signal strength, and navigation module states. 1134 or 2244

If that fails, press and hold the piano key button for 6 seconds.

In Expert Mode, you may find a log of internal system errors, memory usage, or software anomalies. This is useful for dealers to see if the infotainment unit has been crashing or experiencing hardware faults. 4. Display and Audio Testing

I'm not aware of any new BTA/ATB compatible boxes with 4G+ support. And the dealers, as usual, probably don't know how this works. Peugeot Forums Engineering mode 2019 5008 - French Car Forum

(crucial before attempting an infotainment update).

Release the button to reveal the hidden password input screen. Known Engineering Mode Codes for Peugeot 2008

If you don't know what a setting does, do not change it. This mode is best used as a viewing tool for diagnostics rather than a playground for modifications.

If none of these work, your unit may have a rolling code or a VIN-specific hash. In that case, you will need dealer-level diagnostic tools (DiagBox or PP2000).