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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 P1A8A: DC/DC Converter Temperature Sensor Circuit Range/Performance Fail >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Temperature check
  1. Faulty LDC
  2. Temperature sensor failure
  3. Temperature sensor circuit over
Enable Conditions
  • Ignition ON
  • Aux. Battery Voltage is between 9V and 16V
  • Engine Off maintain over time 480min
  • EWP operation is maintained for at least 10 seconds
  • MCU CAN normal reception
  • MCU temperature sensor in the absence Error data
  • No lack of engine coolant
Threshold Value
  • Heatsink absolute value of the temperature and the temperature difference is more than 30 °C LDC
Diagnosis Time
  • 10 sec
DTC
  • 1 Driving Cycle
Service Lamp On Condition
  • 1 Driving Cycle