B173d Peugeot Work Direct

Ignoring this code can lead to dangerous driving conditions. If the ECU cannot verify when you are braking, it may disable emergency braking assistance or electronic stability control. Furthermore, if your brake lights are not functioning correctly, you run a high risk of being rear-ended.

It started on a Tuesday morning. You go to start your Peugeot 308, but instead of the familiar engine rumble, the dashboard flashes a "Key Not Detected" warning. You try again, and it starts—but now the central locking is acting up, and a persistent Engine Management warning light has appeared. The Diagnostic Rabbit Hole b173d peugeot work

Stop the car, remove the key (if necessary), and close all doors. Wait for 3 minutes for the BSI to enter sleep mode. Disconnect the negative battery terminal. Wait at least 5 minutes. Reconnect the battery and wait another 2 minutes. Try starting the car. 5. Check for Antenna Obstructions Ignoring this code can lead to dangerous driving conditions

in Peugeot and Citroën (PSA) vehicles signifies a permanent or intermittent fault in identifying the mechanical/electronic key or hands-free remote control present in the reader (Identifier Invalid) . This critical error code triggers when the vehicle’s central control unit, the Built-in Systems Interface (BSI), fails to recognize the transponder code or the keyless access authorization signal. It started on a Tuesday morning

(mobile phones, NFC devices) that could interfere with the transponder signal.

Diagnostic Trouble Code (DTC) B173D is a body-system fault code closely tied to the immobilizer system. When you press the start button or insert the key, the car initiates a security handshake.