B173d Peugeot Work Online

Your brake lights may stay on constantly or fail to light up at all. Root Causes of B173D

Because the BSI governs vehicle access and ignition authorization, a failure at this checkpoint triggers an immediate command to the Engine Control Unit (ECU) to keep the electronic immobilizer locked. Common Symptoms

Intermittent limp mode, B173D stored. Attempted fix (outside garage): New battery, new glow plugs – no change. Our diagnosis: Measured relay coil resistance – open circuit. Replaced pre-heat relay ($35). B173D returned after 3 days. Root cause: Relay socket corrosion caused heat damage to the new relay. Final work: Replaced entire BPGA unit and both relays. Executed BMS reset. Result: 6 months, 8,000 miles – no reoccurrence. b173d peugeot work

Tell us your car model and what happened leading up to the fault in the comments below!

: If the code persists, a technician using Peugeot-specific software (like Diagbox) may need to perform "telecoding" to re-pair the keys to the BSI. French Car Forum Your brake lights may stay on constantly or

Q: How do I repair the B173D Peugeot work code? A: To repair the B173D Peugeot work code, replace the actuator, repair or replace the wiring, replace the BCM, or reset the BCM.

Reconnect, wait another , then turn on the side lights and ignition without starting for a minute to allow the BSI to re-initialize. Attempted fix (outside garage): New battery, new glow

Electrical gremlins in modern Peugeots rarely have a single source. The B173D error is generally caused by one of the following culprits: 1. Weak or Dead Key Fob Battery

Q: How do I troubleshoot the B173D Peugeot work code? A: To troubleshoot the B173D Peugeot work code, use a scan tool to retrieve the DTC, check the actuator, wiring, and BCM, and check the voltage.

If you have a second key, try it. If the second key works, the issue is with your primary key fob. 3. Check the Car Battery