Home >> Land Rover >> 2021 >> Discovery R-Dynamic HSE >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Rear Differential Control Module (RDCM) (G2016121) >> DTC P18A5-64: Motion/Position Sensor A Signal Circuit - Signal plausibility failure >> Possible Causes