Home >> Jaguar >> 2013 >> XF 3.0, AWD >> Repair and Diagnosis >> General Information >> 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 P186A-13: Differential Lock-up Actuator Brake Control Circuit/Open - Circuit open >> Possible Causes