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Home >> Hyundai >> 2018 >> Elantra SE, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (1 Of 3) >> DTC P0125-00: Insufficient Coolant Temperature For Closed Loop Fuel Control >> System Inspection

System Inspection

■ Coolant Level Inspection 

  1. Check the cooling system coolant level.
  2. Is the coolant in the reservoir at the proper level?

    YES 

    • Go to next step below.

    NO 

■ Thermostat Inspection 

  1. Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed. Replace thermostat as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
  2. Check the valve opening temperature of the thermostat

    Specification (Valve opening temperature):  100 ± 2°C (194 ± 2.7°F)

  3. If the opening temperature is not as specified, Replace thermostat as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure. If OK, go to next step below.
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