B173d - Peugeot

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

It sounds simple, but a fresh CR2032 (or similar) battery fixes a significant percentage of B173D errors. After replacing it, you may need to re-sync the key by putting it in the ignition, turning to position 2, and holding the lock button for 10 seconds.

The physical coil or antenna that picks up the transponder signal (usually around the ignition switch or in the center console) may be faulty or have a loose connection. Troubleshooting and Fixes b173d peugeot

The engine turns over, but the fuel or ignition is cut off.

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. The car starts fine some days but fails

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.

Before spending hundreds at a dealership, try these steps in order: 1. Replace the Key Fob Battery The physical coil or antenna that picks up

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