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The hands-free passive signal weakens, forcing the reader to rely entirely on a physical mechanical backup slot.
This code is categorized as a "Body" code, typically managed by the , which is the central control unit for the vehicle's electronic functions. When this fault is active, the vehicle's immobilizer system fails to recognize the authorized signal from the key fob, leading to several operational issues. Primary Symptoms : b173d peugeot
The official technical definition for is: "Fault in identifying the mechanical/electronic key or the hands-free remote control present in the reader." The hands-free passive signal weakens, forcing the reader
In the PSA Group (Peugeot/Citroën), fault codes starting with "B" refer to systems. The B173D specifically indicates an issue with the Hands-Free Remote Identification . Primary Symptoms : The official technical definition for
: Often accompanied by messages like "Electrical circuit fault" or "Battery charge fault". French Car Forum Potential Causes Peugeot BSI Unexpected Reinitialization Fault - Gumtree 8 Dec 2025 —
If voltage tests show no power, trace the two wires back to the BSI (under the dashboard). This is tedious. A professional auto electrician will charge ~$80 to repair a broken wire. Do not attempt unless you have wiring diagrams.
The B173D Peugeot code remains an enigma, shrouded in mystery. While we've uncovered some potential leads, much more research is needed to crack the code. Further investigation could involve: