The "extra quality" portion of your query likely refers to a sub-status or specific diagnostic remark used in advanced scanners to describe the nature of the electrical fault (such as high resistance or a specific type of signal failure).
The phrase "Extra Quality" in this context is likely a translation artifact or a specific diagnostic sub-status used by some scanners (like SDD or Pathfinder) to describe a or high-confidence fault state. Diagnostic Overview: B109C-15 : Body Control Module (BCM) / Driver Door Module (DDM). land rover b109c15 extra quality