Home >> Land Rover >> 2021 >> Range Rover SVAutobiography Dynamic Blk. >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index: Transmission Control Switch (TCS) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index: Transmission Control Switch (TCS) (G2016292) >> DTC U0028-87: Vehicle Communication Bus A - Missing message >> Possible Causes