Home >> Land Rover >> 2021 >> Discovery R-Dynamic HSE >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Transfer Case Control Module (TCCM) (G2016129) >> DTC U3006-85: Control Module Input Power "A" - Signal above allowable range >> Possible Causes