Home › Land Rover › 2018 › Range Rover Autobiography › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Adaptive Speed Control Module (ASCM) -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Adaptive Speed Control Module (ASCM) › Description And Operation › DTC U0305-4A: Software Incompatibility with Cruise Control Module - Incorrect component installed › Possible Causes