Home >> Jaguar >> 2018 >> XJR575 >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> General Information - Diagnostic Trouble Code (DTC) Index (SASM - VDCM) -- XJ/X351 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) (G2171873) >> DTC U0028-88: Vehicle Communication Bus A - Bus Off >> Possible Causes