Home >> Land Rover >> 2021 >> Defender 90 S >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Rear Differential Control Module (RDCM) (G2400909) >> Description And Operation >> Rear Differential Control Module (RDCM) >> DTC P2787-4B: Clutch Temperature Too High - Over temperature >> Possible Causes