Use your diagnostic tool to access the Built-In Systems Interface (BSI).
Remove the lock assembly from the door. Use a multimeter to test the pins on the lock connector (refer to a wiring diagram for your specific model, typically 4 to 6 pins): b173d peugeot work
The B173D code is rarely a software issue; it is almost always a physical electrical failure. Common causes include: Use your diagnostic tool to access the Built-In