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Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (3 Of 3) >> DTC U0456: Invalid Data Received From Coolant Temperature Control Module >> DTC Information >> DTC Description

July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC Description

If there is no message from electronic water pump to ECM through external CAN line, ECM sets DTC U0456.

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