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2021
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GV80 3.5T Advanced
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Repair and Diagnosis (Single Page)
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Transmission
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Transmission Control Systems
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4WD Control Diagnosis
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DTC U0121-00: Lost Communication With Anti-Lock Brake System (ABS) Control Module
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DTC Information And Inspection
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Corrective Action
Corrective Action
Clear the DTC and see if it returns.
If the DTC returns: It could be temporal DTC. Go to the "Verification of Vehicle Repair" procedure.
If the DTC returns: Go to the "P-CAN Communication Inspection" procedure.