Home >> Land Rover >> 2016 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index: Transmission Control Switch DTC: Transmission Control Switch (TCS) -- Range Rover/L405 >> Diagnostic Trouble Code Index: Transmission Control Switch DTC: Transmission Control Switch (TCS) >> Description And Operation >> DTC U0028-88: Vehicle Communication Bus A - Bus off >> Possible Causes