Home >> Land Rover >> 2023 >> Range Rover Velar HST >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- Range Rover Velar/L560 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Restraints Control Module (RCM) (G2688338) >> B0021-1A: Left Curtain Deployment Control 1 - Circuit resistance below threshold >> Possible Causes