: Blown fuses in the BSI or loose connections in the CAN bus network can prevent the reader from communicating with the ECU. Troubleshooting and Fixes
When this code appears, the vehicle's security system is having trouble recognizing the transponder signal from your key. Common symptoms and context for this fault include: b173d peugeot work
: It frequently appears alongside other codes like B1808 (engine ECU immobilizer unlocking fault) or B1624 (protection unit relay faults). Common Causes : Blown fuses in the BSI or loose
: 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. Common Causes : A weak or aging vehicle
: The car may refuse to crank or start because the BSI is blocking the engine ECU due to an immobilizer mismatch.
: The internal transponder chip or the hands-free remote battery may be failing.