: A shorted sounder can stay "awake," draining your main car battery overnight.
The Land Rover fault code typically refers to a "Battery Backed Sounder" (alarm siren) issue, specifically indicating a Missing Message or communication failure. Key Details of Fault B1D17-87 land rover b1d1787
The non-contact position sensor can fail internally. Instead of sending a normal range signal, it may short to the 5V reference line, causing the feedback wire to read a constant 5V (or close to it). Once a sensor fails this way, the actuator must be replaced. : A shorted sounder can stay "awake," draining
, often characterized as a "missing message". This code typically relates to the Battery Backed-up Sounder (BBUS) the actuator must be replaced.