: An old or failing battery that can no longer hold a charge within expected parameters can trigger the sensor to report a fault. How to Fix DTC B123A
A "check lighting" or general "spanner" warning light may appear.
No. The airbag ECU has non-volatile memory. Disconnecting the battery will not clear B123A. You must use a diagnostic scanner. dtc b123a renault link
A physical disruption in the wiring harness or a blown link fuse feeding that specific branch of the power distribution grid.
Battery light ON, Stop Light ON, Start-Stop system deactivated, sometimes failure to start. : An old or failing battery that can
: Check for a broken filament or dark scorching. Replace with a standard bulb to see if the code clears.
BCM Codes no front turn signals | Ford Powerstroke Diesel Forum The airbag ECU has non-volatile memory
It depends. If it's related to parking sensors or the Start-Stop system, the car is generally safe to drive, though you will lose those functions. However, a faulty battery or a failing alternator (which can also set this code) carries the risk of a sudden breakdown. If the code is related to a turn signal, it creates a significant safety hazard, as other drivers cannot see your intentions.
The buckle contains a hall-effect sensor or a mechanical switch. If this fails, it sends the wrong status to the ECU, which interprets it as a link interruption.