Renault Link [new] - Dtc B123a

A depleted or aging 12V battery can cause "ghost" codes across multiple modules. Pin Displacement:

: Inspect the harness behind the rear bumper for signs of corrosion or wire chafing. Diagnostic Tool Renault-compatible scanner dtc b123a renault link

: Check for 12V on Pin 1 and LIN bus activity on Pin 2 of the battery sensor connector. A depleted or aging 12V battery can cause

: A blown or incorrect wattage bulb in the front left turn signal. " "Battery Charging Fault

: You may see a "Check Start-Stop," "Battery Charging Fault," or a general spanner service light on the dashboard. Abnormal Alternator Voltage

No. The airbag ECU has non-volatile memory. Disconnecting the battery will not clear B123A. You must use a diagnostic scanner.