Home >> Land Rover >> 2020 >> Range Rover SVAutobiography Dynamic >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Headlight Control Module (HCM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Headlamp Control Module (HCM) (G2167619) >> DTC B1D02-4B: Left High Beam Circuit - Over temperature >> Possible Causes