Home >> Land Rover >> 2021 >> Range Rover Base >> Repair and Diagnosis (Single Page) >> General Information >> Specifications Index >> 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) (G2364188) >> DTC U0401-02: Invalid Data Received From ECM/PCM "A" - General signal failure >> Possible Causes