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Home >> Hyundai >> 2005 >> Elantra GLS, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Troubleshooting Procedures >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Cooling System Inspection
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Cooling System Inspection

  1. Check cooling system coolant level and fill if low.
  2. Check for a proper cooling system operation. Especially check that cooling and condenser fan working normally.
  3. Remove the thermostat and check the following items:
    1. Stuck or damaged
    2. Verify the temperature at which the valve begins to open.

      Valve opening temperature : 80~84°C(176~183.2°F)

      Valve opening temperature : 95°C(203°F)

  4. Is a problem found?

    YES 

    NO 

    • Go to next step as below.