930708 is a fault stored in your BMW's memory (an ISTA fault code, not a standard OBD-II P-code).
What it means: Automatic terminal 15 (ignition) switch-off was not carried out. The electronics wanted to cut power to save the battery but was inhibited: a diagnostic scanner is plugged in, lights are on, a pedal is pressed, the selector is in N, the car is rolling, or programming is running. Usually just an information entry after work on the car — nothing to do. If it keeps appearing on its own, check the 12 V battery.
