B173d - Peugeot

This code indicates that the BSI has experienced an issue while trying to recognize and authenticate your key or its remote functions. It is a , meaning it relates to the body control module rather than the engine or transmission directly. The B173D code often appears along with other B-codes (like B1808) and network communication U-codes, forming a cascade of alerts that all point toward a deeper central electrical problem.

Unplug the electrical connector from the glow plug control unit and test each glow plug directly at the unit's connector pins. You need the pinout diagram for your specific Peugeot engine (DV6 or DW10). For cylinder 4, you should see approximately 0.6 to 1.2 Ohms . b173d peugeot

Understanding and Fixing Peugeot/Citroën Fault Code B173D: Keyless System Failures This code indicates that the BSI has experienced

Fault code on a Peugeot indicates an "Error identifying the mechanical/electronic key or hands-free remote control" . This means your car's Built-in Systems Interface (BSI) or Body Control Module is struggling to recognize the signal from your key or transponder. Unplug the electrical connector from the glow plug

: The car fails to detect the key when placed in the reader or when attempting a hands-free start. Dashboard Warnings