Home >> Land Rover >> 2020 >> Defender 110 HSE >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: CHASIS Control Module (CHCM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Chassis Control Module (CHCM) (G3139555) >> Description And Operation >> Chassis Control Module (CHCM) >> DTC C105A-01: Actuator Circuit Group A - General electrical failure >> Possible Causes