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Home >> Hyundai >> 2018 >> Kona Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Engine Control System Diagnosis - 2.0L (2 Of 6)) >> DTC P0125-00: Insufficient Coolant Temperature For Closed Loop Fuel Control >> System Inspection >> Thermostat Inspection

Thermostat Inspection

WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed.
  2. Check the valve opening temperature of the thermostat

    Specification: 

    Valve opening temperature: 93 to 97°C (199.4 to 206.6°F)/Full opening temperature: 110°C (230°F)

  3. Is the thermostat in normal condition?

    Good 

    No Good 

    • Carefully re-do this troubleshooting guide steps.
    • If problem still occurs, replace thermostat and then go to "VERIFICATION OF REPAIR " procedure.