Unlike generic OBD-II codes (which start with P, B, C, or U followed by four digits), the code is a body code that requires manufacturer-specific software to interpret fully. Ignoring it can lead to annoying electrical gremlins, battery drain, or even a failed vehicle inspection.
: The vehicle may crank but fail to start, or it may not respond to the start button/ignition at all. Central locking failure : The remote may fail to lock or unlock the doors. Potential Causes and Solutions b173d peugeot
Sometimes the BSI simply needs a reboot. Glitches in the software can lead to a "Permanent Fault" status for B173D even if the key is perfectly fine. Unlike generic OBD-II codes (which start with P,
Here is a breakdown of what this code means and how to address it. Central locking failure : The remote may fail
Before spending hundreds at a dealership, try these steps in order: 1. Replace the Key Fob Battery
The control unit (a small black or silver box mounted on the rocker cover or near the injectors) is a solid-state relay. It can fail for cylinder #4 only. If the MOSFET (transistor) controlling Cylinder 4 burns out, you will get a B173D code even with a perfect glow plug and wiring.