Home >> Jaguar >> 2011 >> XJ Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Parking Aid Control Module (PACM) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Parking Aid Control Module (PACM) >> Description And Operation >> Parking Aid Control Module (PACM) >> DTC U0046-86: Vehicle Communication Bus C - Signal Invalid >> Possible Causes