Home >> Land Rover >> 2020 >> Defender 110 First Edition >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) For 8HP76/51 Transmission -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Transmission Control Module (TCM) For 8HP76/51 Transmission (G2413630) >> Description And Operation >> Transmission Control Module (TCM) - 8HP76/51 Transmission >> DTC P0725-81: Engine Speed Input Circuit - Invalid serial data received >> Possible Causes