: Check the fuse box (BSI unit) for any blown fuses related to the ignition or anti-theft system.
: The internal transponder chip may be damaged or out of sync.
Switch off the ignition, close all doors, and wait 3 full minutes for the BSI to enter sleep mode. b173d peugeot work
A third user had a situation where the hands‑free keyless entry stopped working on the driver’s side after a battery change. Diagbox showed B173D (key identification fault) and B1715 (locking status fault). The ultimate fix involved re‑synchronising the keys using the Diagbox procedure and replacing a faulty door lock actuator.
He sighed. In the technical manuals, B173D meant the car had forgotten its owner. The "Identifier Invalid" error meant the hands-free remote sitting in his pocket was now a stranger to the ignition reader. The car wasn't broken in the traditional sense—no gears were stripped, no oil was leaking—it was simply having a crisis of identity. Elias tried the old mechanic's ritual: the : Check the fuse box (BSI unit) for
If you want, tell me the Peugeot model and year (or allow me to assume a common model like 208/308/2008) and I’ll provide part numbers and a step-by-step replacement procedure.
To diagnose and repair the B173D fault code on a Peugeot vehicle, follow these steps: A third user had a situation where the
Connect your scanner. Read all ECUs (Engine, BSI – Body Systems Interface). Record freeze frame data (battery voltage, temperature). Clear codes, then perform a road test. If B173D returns immediately, proceed.