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Home >> Hyundai >> 2019 >> Santa Fe SEL Plus, AWD >> Repair and Diagnosis >> Transmission >> Transfer Case >> 4WD Control System Diagnosis >> DTC U1121: Lost Communication With Electric Stability Program Module >> DTC Information And Inspection >> DTC Setting Condition
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DTC Setting Condition

Trouble shooting Condition Possible Cause
Main action
  • Monitor the SAS CAN signals.
  1. Poor contact of connectors of each communication module
  2. Open/short in the CAN communication circuit
  3. ESC (ESP) ECU.
Prerequisite condition
  • Turn the ignition switch on or start the engine.
Threshold value
  • An ESC (ESP) 2 message is not received.
Diagnosis time
  • 2 sec.
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