The B173D Peugeot work code is a five-character code that is used to identify a specific problem with the vehicle's electrical system. The code is made up of a letter and four numbers, with the letter "B" indicating that the code is related to the vehicle's body control module (BCM). The numbers "173D" provide more specific information about the problem, which in this case is related to the actuator circuit.
[Key / Remote FOB] ---> Sends Transponder ID ---> [Ignition Reader / Key Slot] | [Engine ECU] <--- Keeps Immobilizer Locked <--- [BSI Module] (Fails to Validate) | (Result) ---> DTC B173D Stored & No-Start Condition Triggered b173d peugeot work
Damaged wiring between the keyless antenna and the BSI. The B173D Peugeot work code is a five-character
He sighed. In the technical manuals, B173D meant the car had forgotten its owner. The "Identifier Invalid" error meant the hands-free remote sitting in his pocket was now a stranger to the ignition reader. The car wasn't broken in the traditional sense—no gears were stripped, no oil was leaking—it was simply having a crisis of identity. Elias tried the old mechanic's ritual: the [Key / Remote FOB] ---> Sends Transponder ID
The issue is frequently solved by replacing the key battery, but it can occasionally point to complex BSI issues. Start with the basics—battery and key check—and work your way through the troubleshooting steps.
Frequent alerts on the dashboard even when the key is in the ignition or reader. Occasional starting: The car might start fine one moment and fail the next. Top Causes and How to Fix Them