Home >> Land Rover >> 2015 >> Range Rover Autobiography >> 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 C1B11-28: Pressure Control Valve - Signal bias level out of range/zero adjustment failure >> Possible Causes