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Home › Hyundai › 2017 › Tucson Value, 4WD › Repair and Diagnosis › Transmission › Transfer Case › 4WD Control System Diagnosis › DTC U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module › DTC Information › DTC Description

DTC Description

If the 4WD ECU doesn't get some ESP/ESC/VDC signals from ESP/ESC/VDC module, it sets U0121.

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