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Home >> Hyundai >> 2021 >> Elantra N Line, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Engine Control System Diagnosis - 2.0L (Except HEV) (5 Of 6)) >> DTC P2181-00: Cooling System Performance >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Cooling water temperature check
  1. Poor Connector Connection
  2. Faulty ITM circuit
  3. Faulty ECTS
  4. Faulty ITM
Enable Condition
  • Percentage of deceleration fuel cut-off time less than 15%
  • Percentage of low load condition less than 50% (air volume less than 20 to 35kg/h, depending on outside temperature)
  • Percentage of high speed condition less than 90% (vehicle speed more than 140km/h (86.99MPH))
  • Percentage of low speed condition less than 90% (vehicle speed less than 40km/h (24.85MPH))
  • The percentage of the automatic engine stop condition less than 15%
  • Do not maintain high engine speed in stop mode.
    • Based on high engine speed (over 4800RPM)
    • High engine speed retention time for more than 10 seconds
    • Decrease of coolant temperature at high engine rotation more than 2.25°C (36°F)
  • ECT temperature at start -6°C to 54.75°F (21.2°C to 130.55°F)
  • When the intake air temperature is higher than -6°C (21.2°F)
  • Ambient temperature is higher than -6°C (21.2°F)
  • If there are no related errors
Threshold Value
  • When the ECT temperature measured at a ECT model temperature of higher than 85°C (185°F) is lower than 73.9°C (165°F)
Diagnostic Time
  • 10 to 30 minutes (depending on coolant temperature and operating conditions at engine start-up)
MIL ON Condition
  • Immediately