The Peugeot fault code B173D identifies a failure in the recognition of the mechanical or electronic key (or remote control) by the vehicle's immobiliser system. This diagnostic trouble code (DTC) is commonly associated with Peugeot and Citroën vehicles, particularly when the car fails to start or displays a "key not detected" warning. Understanding B173D: Causes and Symptoms
The "story" of B173D in a Peugeot is essentially a tale of a car that has forgotten its owner. In technical terms, B173D is a diagnostic fault code that indicates a failure to identify the mechanical/electronic key or the remote control [25]. What happens to the car?
Final note: B173D cannot be fixed by disconnecting the battery, swapping fuses, or using an SRS reset tool alone. It requires component-level diagnosis and often physical replacement of the seat occupancy sensor mat plus calibration. If you don't have Diagbox, a specialist Peugeot/Citroën diagnostic shop is recommended.
Engine failure service code indicates everything is wrong in the car
Conclusion and Future Directions
The Peugeot fault code B173D identifies a failure in the recognition of the mechanical or electronic key (or remote control) by the vehicle's immobiliser system. This diagnostic trouble code (DTC) is commonly associated with Peugeot and Citroën vehicles, particularly when the car fails to start or displays a "key not detected" warning. Understanding B173D: Causes and Symptoms
The "story" of B173D in a Peugeot is essentially a tale of a car that has forgotten its owner. In technical terms, B173D is a diagnostic fault code that indicates a failure to identify the mechanical/electronic key or the remote control [25]. What happens to the car?
Final note: B173D cannot be fixed by disconnecting the battery, swapping fuses, or using an SRS reset tool alone. It requires component-level diagnosis and often physical replacement of the seat occupancy sensor mat plus calibration. If you don't have Diagbox, a specialist Peugeot/Citroën diagnostic shop is recommended.
Engine failure service code indicates everything is wrong in the car
Conclusion and Future Directions
