B173d Peugeot ✦ Hot & Recommended

The simplest cause. If the signal is too weak, the reader near the ignition barrel or in the cabin can't "handshake" with the key.

If you've connected a diagnostic tool to your Peugeot and seen , you are likely dealing with a frustrating "no-start" or "key not detected" scenario. This specific manufacturer code is a common headache for owners of modern models like the Peugeot 308, 3008, 5008, and the Partner van. What Does Fault Code B173D Mean? b173d peugeot

On Peugeot and Citroën (PSA Group) vehicles, is defined as: The simplest cause

While a faulty key is the most obvious culprit, B173D is often a symptom of wider electrical "confusion" in the Peugeot's complex BSI system. This specific manufacturer code is a common headache

Peugeot electronics are notorious for throwing "ghost codes" when the main 12V battery is dying. Low voltage during the start-up sequence can cause the BSI to fail the key identification check.

Essentially, the car’s central computer (the or Built-in Systems Interface) cannot verify that a valid key is being used. Because this is tied to the immobiliser system , the vehicle will often refuse to crank or start to prevent theft. Common Symptoms

The car starts fine some days but fails others, often in cold or damp weather.