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Kia
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2020
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Optima EX Premium
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Dual Clutch Transmission Diagnosis - 1.6L (2 Of 2) (Except HEV)
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DTC U0121-87: Lost Communication With Anti-Lock Brake System (ABS) Control Module
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DTC Information
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DTC Description
DTC Description
When the TCM cannot read the data from the ESP through the CAN-BUS line, the TCM sets this code.