This issue is rarely a simple mechanical failure. It is almost always a failure in the communication between the key, the key reader, and the BSI module.
: Dropping the key can fracture the fragile, surface-mounted transponder coil inside the key casing. 2. Low Vehicle System Voltage b173d peugeot
: Many electronic communication errors can be cleared by performing a "soft reboot" of the BSI module. This involves a specific sequence of disconnecting and reconnecting the battery. This issue is rarely a simple mechanical failure
The Peugeot BSI (Built-in Systems Interface) experiences temporary data corruption or an unexpected reinitialization error. the key reader
When this code is logged, it means the car's BSI module (the brain controlling body electronics) is struggling to communicate with, or authenticate, your smart key fob. Common Symptoms of B173D message on the dashboard.