B173d Peugeot Work [patched] <Top 10 TOP-RATED>

This case proves that simply changing the relay is often insufficient. The must be evaluated.

In Peugeot (and broader PSA Group) vehicles, the fault code primarily identifies a communication or authentication failure within the vehicle's immobilizer system b173d peugeot work

If your car is already running, the steering won't suddenly lock while driving. However, if you see this message, avoid driving long distances and get it to a workshop immediately. Once you turn the car off, the faulty lock might refuse to disengage again, leaving you stranded. This case proves that simply changing the relay

Based on troubleshooting data from Peugeot/Citroën technical forums: However, if you see this message, avoid driving

Once the cause of the B173D fault code is identified, the necessary repairs can be undertaken:

: The car may refuse to crank or start because the BSI is blocking the engine ECU due to an immobilizer mismatch.