Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Parking Assist Control Module (PACM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Parking Assist Control Module (PACM) >> Description And Operation >> DTC B1B54-12: Function LED - Park Aid - Circuit short to battery >> Possible Causes