: A message appearing on the dashboard even when the key is inside the vehicle.
It seems you're asking for content related to . This is a manufacturer-specific diagnostic trouble code (DTC) typically found in Peugeot (and Citroën/DS) vehicles, often concerning the airbag / supplemental restraint system (SRS) .
In simple terms, this code indicates that the Body Control Module (BSI) has detected a discrepancy between the command sent to the door lock and the status signal returned by the door lock mechanism. The BSI commands the door to lock, but the feedback circuit tells the BSI the door is still unlocked (or vice versa).
Poorly installed aftermarket devices (e.g., dashcams, aftermarket alarms, mobile phone chargers, or OBD (On-Board Diagnostics) dongles left plugged in) can draw power or generate electrical noise that disturbs the BSI. b173d peugeot work
Wiring related to the antenna or BSI system may have developed corrosion 1.2.4 . How to Fix B173D Peugeot Work: Step-by-Step
The B173D fault is rarely caused by a mechanical engine issue. It is almost entirely an electrical or electronic communication error.
: The key reader or keyless antenna searches for a pre-registered encrypted identifier. : A message appearing on the dashboard even
Clear codes with OBD2 / PP2000 diagnostic tool (generic scanners may not reset SRS codes – need Diagbox / Lexia).
Even when the key fob is resting in your hand or positioned inside the center console slot, the central screen throws a detection error.
Cannot unlock/lock with the fob. 5. Troubleshooting & Recommended Fixes BSI Intermittent faults - Peugeot Forums In simple terms, this code indicates that the
Start by checking the fuse related to the brake lights and body electronics. A simple 5-amp or 10-amp fuse replacement can sometimes clear the code immediately. 2. Testing the Switch
A blown fuse in the engine bay or cabin fuse box can prevent the signal from reaching the ECU. Troubleshooting and Repair Work
If you have a second key, try it. If the second key works, the issue is with your primary key fob. 3. Check the Car Battery
The key has lost pairing with the car's BSI.
To diagnose and repair the B173D fault code on a Peugeot vehicle, follow these steps: