Home >> Jaguar >> 2014 >> XF Base >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Rear Differential Control Module (RDCM) -- XF/X250 >> Diagnostic Trouble Code (DTC) Index DTC: Rear Differential Control Module (RDCM) >> Description And Operation >> DTC P18A8-74: Differential Actuator Brake Control - Actuator slipping >> Possible Causes