Home >> Land Rover >> 2014 >> Range Rover Base >> Repair and Diagnosis >> General Information >> DTC Index >> 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 P084F-29: Park/Neutral Switch Output Circuit - Signal invalid >> Possible Causes