Dtc B123a Renault Link Jun 2026

The Intelligent Battery Sensor communicates with the vehicle’s main computers via a thin wire harness (usually a single or dual-wire LIN-bus connector plugged into the negative terminal sensor). If this small gray/black plug is unclipped, corroded by battery acid, or the wire is broken during a battery swap, B123A will trigger. 3. Faulty Intelligent Battery Sensor (IBS)

Check if the rear left door:

: If the wiring and fuse are intact, the sensor itself (Part No: 295C30372R for some models) may need to be replaced . dtc b123a renault link