Home >> Land Rover >> 2021 >> Range Rover SVAutobiography Dynamic Blk. >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Rear Differential Control Module (RDCM) (G2364185) >> DTC P186A-13: Differential Lock-up Actuator Brake Control Circuit/Open - Circuit open >> Possible Causes