Home › Land Rover › 2021 › Defender 90 First Edition › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Infotainment Compute Control Module (ICCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Infotainment Compute Control Module (ICCM) (G2400897) › Description And Operation › Infotainment Compute Control Module › DTC B12B8-01: USB Port #2 - General electrical failure › Possible Causes