Home › Land Rover › 2019 › Range Rover Autobiography › Repair and Diagnosis › Quick Lookups › Common Specs & Procedures › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- Range Rover/L405 › General Information › Description And Operation › Diagnostic Trouble Code Index - DTC: Transmission Control Module (TCM) (G2016296) › DTC P0606-04 Control Module Processor - System internal failures › Possible Causes