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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Active Air Flap-Left Diagnosis (HEV) >> DTC U0001: High Speed CAN Communication Bus off >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN Message signal confirmation
  1. Poor connection of each Module connectors.
  2. Open or Short in CAN communication.
  3. Faulty CAN communication Module.
Enable Conditions
  • IG KEY "ON" or Engine "ON"
Threshold Value
  • No receiving CAN message.
Diagnosis Time
  • 0.5 sec.
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