Home >> Land Rover >> 2023 >> Range Rover Velar HST >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index Vehicles With MHEV DTC Battery Energy Control Module (BECM) -- Range Rover Velar/L560 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - Vehicles With: MHEV, DTC: Battery Energy Control Module (BECM) (G2339851) >> U0077-88: Control Module Communication Bus "E" Off - Bus off >> Possible Causes