Home >> Land Rover >> 2022 >> Defender 90 V8 >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Transfer Case Control Module (TCCM) (G2400921) >> Description And Operation >> Transfer Case Control Module (TCCM) >> DTC P0666-64: Control Module Internal Temperature Sensor "A" Circuit - Signal plausibility failure >> Possible Causes