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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> HCU/Low Dc-Dc Converter Diagnosis (HEV) >> DTC P1790: Variant Coding Error >> DTC Information and Inspection >> DTC Detecting Condition

DTC Information and Inspection: DTC Detecting Condition

Item Detecting Condition Possible Cause
Main action
  • Internal monitoring
  1. Variant coding not performed
  2. Faulty HPCU
Prerequisite condition
  • Turn ignition switch ON
  • Aux. Battery Voltage is between 10V and 16V
  • CAN communication line in normal condition
Threshold Value
  • Variant coding not performed
Diagnosis Time
  • -
DTC
  • -
Service Lamp On Condition
  • -
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