Modern Peugeot engines (DV6 and DW10 BlueHDi) use a "Glow Plug Control Unit" that keeps the glow plugs active for up to 3 to 4 minutes after the engine starts. They assist with:
: Issues with the transponder aerial (the ring around the ignition barrel) or associated wiring can disrupt the signal . Recommended Steps for Resolution
: A low battery in the remote can prevent the immobilizer signal from being read correctly .
This comprehensive guide breaks down the exact meaning of B173D, its technical root causes, accompanying fault codes, and a structured diagnostic pathway to resolve the issue. 📋 What is Fault Code B173D? b173d peugeot
If the glow plug tests fine electrically, but the code persists, you may have carbon "bridging." The mechanic must:
A low or faulty vehicle battery is the single most common cause of inexplicable B-codes, including B173D. Modern Peugeots are extremely sensitive to voltage drops. When the battery voltage falls below a threshold, the BSI may not have enough power to correctly interpret signals from the key, resulting in a “Fault in identifying” code.
The official technical definition for is: "Fault in identifying the mechanical/electronic key or the hands-free remote control present in the reader." Modern Peugeot engines (DV6 and DW10 BlueHDi) use
When this code is active, the vehicle typically exhibits security-related failures, including: No-Start Condition
The sensor receives a 12V or 5V reference from the BSI. A blown fuse in the engine bay fuse box (often F11 or F18, check your manual) can cause this code. Additionally, a BSI that needs a software reset can report false codes.
: Software glitches or hardware faults within the BSI module can lead to intermittent key recognition failures. This comprehensive guide breaks down the exact meaning
: On newer models like the 308 or 3008, a fault in the battery protection and management unit can mimic key recognition errors.
In conclusion, the B173D Peugeot error code is a complex issue that requires attention to the vehicle's electrical system and seat belt system. By understanding the possible causes and symptoms, you can take the necessary steps to resolve the issue and get back on the road. If you're unsure about how to proceed, it's always best to consult a qualified mechanic or a Peugeot specialist.
Understanding Peugeot Fault Code B173D: Causes, Symptoms, and Step-by-Step Fixes