Home >> Land Rover >> 2021 >> Defender 90 >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> 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 P0810-28: Clutch Position Control Error - Signal bias level out of range/zero adjustment failure >> Possible Causes