B173d Peugeot Work !!link!! Jun 2026

The car fails to lock or unlock via the key fob.

. At first, it seems simple: maybe the key fob battery is just weak. You swap it out, but the code remains "permanent". The mechanic explains that in modern Peugeots, the BSI acts as a communication hub b173d peugeot work

The BSI and other electronic control units are extremely sensitive to voltage variations. When the battery is old, low on charge, or suffering from a poor connection, the BSI may lose its ability to communicate properly with the key transponder and other peripherals. A weak battery is often cited as the primary cause for a cascade of intermittent fault codes, including B173D. The car fails to lock or unlock via the key fob

If your vehicle throws this Diagnostic Trouble Code (DTC), it means there is a . Essentially, your car's main computer cannot verify that the key you are using is authorized to start the engine. You swap it out, but the code remains "permanent"