Home >> Land Rover >> 2014 >> Range Rover Base >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) >> Description And Operation >> DTC U0404-83: Invalid Data Received From Gear Shift Control Module "A" - Value of signal protection calculation incorrect >> Possible Causes