Home › Land Rover › 2014 › Range Rover Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Dynamic Response Control Module (DRM) -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Dynamic Response Control Module (DRM) › Description And Operation › DTC C1048-72: Safety Control Valve - Actuator stuck open › Possible Causes