Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> General Information >> 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 C1048-28: Safety Control Valve - Signal bias level out of range/zero adjustment failure >> Possible Causes