The "B" prefix indicates the fault is registered within the body electronics or infotainment domain, rather than the core powertrain (P) or chassis (C) domains.
A wire in the loom running between the engine compartment and the amplifier module has rubbed against the chassis, wearing through the insulation. land rover b1d9f11 2021
Damaged pins or a shorted wiring harness in the circuit labeled RPM IN . The "B" prefix indicates the fault is registered
