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Home >> Kia >> 2021 >> Seltos S, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 4WD Control System Diagnosis >> DTC U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN message monitoring
  • Poor connector connection
  • Open in CAN communication line
  • Faulty HECU
  • Faulty 4WD ECU
Enable Condition
  • Engine "ON"
  • Normal operation
Threshold Value
  • HECU CAN message is not received
Detecting Time
  • 2s
Fail Safe
  • 4WD prohibited
MIL
  • "ON"
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