B173d Peugeot Work ~repack~ May 2026

Here’s a helpful, practical review of the Peugeot fault code B173D – covering what it means, symptoms, common causes, and how to fix it.

Low Vehicle Battery: Peugeot electronics are highly sensitive to voltage drops; a dying car battery can cause "phantom" BSI faults. b173d peugeot work

Low Battery Voltage: A weak or aging vehicle battery is a frequent culprit for "ghost" BSI errors, as low voltage can disrupt the sensitive electronics required for key identification. Here’s a helpful, practical review of the Peugeot

Important safety warning ⚠️

• Always disconnect the 12V battery and wait at least 15 minutes before touching any airbag connector or clock spring.
• Never measure resistance directly across an airbag connector with a standard multimeter (may deploy the airbag). Use an airbag-safe ohmmeter or a test harness.
• If unsure, take to a professional.