If a 2021 Land Rover owner reports intermittent battery drain and the dealer finds B1D9F11 in the BPM event log, the fix is not replacing the battery but reflashing the DDM via JLR’s PATHFINDER 2.0, then performing a LIN bus initialization routine.
Despite its name, this code is usually an "invisible" fault found in the infotainment system rather than a mechanical engine issue. land rover b1d9f11 2021
Ensure the battery is fully charged. 2021 models have complex power management systems, and a slightly weak battery, caused by frequent short trips, can cause random codes. If a 2021 Land Rover owner reports intermittent