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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis (PHEV) >> DTC U1004: Lost Communication With Hybrid Powertrain Control Module (H-CAN) >> DTC Information >> DTC Description

DTC Description

The PCM determines H-CAN communication error and sets DTC U1004 if no message received from HCU.

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