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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis - HEV >> DTC U1004: Lost Communication with Hybrid Powertrain Control Module-H-CAN >> General Information >> DTC Description

DTC Description

This DTC is set when PCM/TCM detects that no message relating HCU is received from HEV CAN communication line.

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