The fault code is a minor, non-critical electrical issue that plagues the PSA platform. While it is annoying to see a warning light on your dashboard, the repair is straightforward and inexpensive when approached methodically.
It is crucial to distinguish this Peugeot-specific B173D code from identical numeric codes used by other manufacturers. For example, on certain RAM vehicles, B173D refers to a "Right Power Sliding Door Latch Control 1 Circuit Low" fault, which is entirely unrelated. b173d peugeot
If the simple steps don't work, you will need to dig deeper. The fault code is a minor, non-critical electrical
Peugeot electronic control units are notoriously sensitive to voltage drops. If your vehicle's main 12V battery drops below ~12.2V during a starting request, the BSI may undergo an unexpected reinitialisation or drop data communication packets, resulting in key misidentification errors. 3. Faulty Key Reader or Proximity Antennae For example, on certain RAM vehicles, B173D refers