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Home >> Kia >> 2020 >> Soul GT Line Turbo >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Engine Control System Diagnosis - 2.0L (2 Of 6)) >> DTC P0128-00: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) >> Component Inspection >> Thermostat Check >> Notes

Thermostat Check: Notes

WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
  1. After immersing the thermostat in water, heat the water slowly.
  2. Check the temperature at which the valve opens.

    Specification: 

    Valve open temperature: 90 ± 1.5°C (194 ±34.7°F)

    Valve opening temperature: 100°C (212°F)

  3. Check the amount of valve opening.

    Specification:  8mm or more (100°C/212°F)

Good 

  1. Carefully re-do this troubleshooting guide steps.
  2. If no problems were found, replace the Thermostat and go to "Vehicle S/W Management " procedure.

No Good 

  1. Repair or replace as necessary and then, go to "Verification of Repair " procedure.
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