Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Kia Optima Plug-In Hybrid EXFACTORY OEM SERVICE PROCEDURE
Repair Procedures: Inspection
- Turn the ignition switch OFF.
- Remove the ECTS (Refer to "REMOVALΒ ").
- After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 1 and 3.
- Check that the resistance is within the specification.
| Temperature | Resistance (kΞ©) | |
|---|---|---|
| Β°C | Β°F | |
| -40 | -40 | 48.14 |
| -20 | -4 | 14.13 - 16.83 |
| 0 | 32 | 5.79 |
| 20 | 68 | 2.31 - 2.59 |
| 40 | 104 | 1.15 |
| 60 | 140 | 0.59 |
| 80 | 176 | 0.32 |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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