Home >> Land Rover >> 2021 >> Range Rover SVAutobiography Dynamic Blk. >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index MHEV DTC: Battery Energy Control Module (BECM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - [+] MHEV, DTC: Battery Energy Control Module (BECM) (G2341341) >> DTC U0077-88: Control Module Communication Bus "E" Off - Bus off >> Possible Causes