Home >> Jaguar >> 2017 >> XF S, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Diagnostic Trouble Code Index DTC: Transmission Control Switch (TCS) -- XF/X260 >> Diagnostic Trouble Code Index DTC: Transmission Control Switch (TCS) >> Description And Operation >> Transmission Control Switch (TCS) >> DTC U0028-87: Vehicle Communication Bus A - Missing message >> Possible Causes