Peugeot — B173d

When the BSI registers code B173D, the driver will usually notice one or more of the following security and electrical symptoms:

Before you panic and buy a new sensor, understand that the b173d fault is rarely a catastrophic failure. The most frequent causes are: b173d peugeot

To resolve the B173D Peugeot error code, try the following: When the BSI registers code B173D, the driver

Resolving this code requires a systematic approach using a tool, which is specific to Peugeot/Citroën. 1. Verification Check the AdBlue level. Inspect the battery health (SOH) and charging voltage. 2. Software Updates Peugeot frequently releases ECU firmware updates. Verification Check the AdBlue level

If you have access to a Peugeot-compatible OBDII scanner, clear the code to see if it was a temporary glitch. If it returns immediately, it is a hard fault requiring further investigation. 4. Check for BSI Updates (Dealer Requirement)

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