Home >> Land Rover >> 2016 >> LR4 Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- LR4/L319 >> Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) >> Description And Operation >> DTC P186A-13: Differential Lockup Actuator Brake Control Circuit/Open - Circuit open >> Possible Causes