Home >> Land Rover >> 2023 >> Range Rover Velar HST >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Head-Up Display Module (HUD) -- Range Rover Velar/L560 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Head-Up Display (HUD) (G2020234) >> B1A85-86: Ambient Light Sensor - Signal Invalid >> Possible Causes