The fault code B173D on a Peugeot indicates a failure to identify the mechanical or electronic key (or hands-free remote). This is typically an immobilizer-related issue where the car’s Built-in Systems Interface (BSI) cannot verify the key's security signal, often resulting in a "key not detected" message or a car that cranks but will not start. Immediate Troubleshooting Steps
Conclusion:
Sometimes the BSI just needs a "reboot"—disconnecting the battery following a specific procedure to clear its memory. The Deep Fix: In rare cases, the fault is a corroded fuse unit or a failing relay circuit board buried in the dashboard. The Resolution b173d peugeot work
Understanding Peugeot Fault Code B173D: The Key Identification Error If you’ve hooked up a diagnostic tool like to your Peugeot and seen Fault Code B173D The fault code B173D on a Peugeot indicates
If you are facing a "no start" situation with code B173D, you can attempt these diagnostic steps: Electrical circuit fault: have your vehicle repaired The Deep Fix: In rare cases, the fault
: If the code persists, a technician using Peugeot-specific software (like Diagbox) may need to perform "telecoding" to re-pair the keys to the BSI. French Car Forum