Home >> Land Rover >> 2021 >> Defender 90 X >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> 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 B19FB-12: GSM (Group System for Mobile) Antenna #2- Circuit short to battery >> Possible Causes