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Home >> Hyundai >> 2020 >> Tucson Value, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 4WD Control Diagnosis >> DTC U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module >> DTC Information And Inspection >> DTC Description

DTC Description

U0121 sets when an ESC/ESP signal is not input during CAN communication between the 4WD ECM and the ESC module.