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K. Wiggins
K. Wiggins, ASE Certified Technician
Category: Kia
Satisfied Customers: 2512
Experience:  Asian Import Specialist, AA in automotive Technology, 15+ years in the trade
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Kia Optima EX: The temperature gauge shows that the car is

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The temperature gauge shows that the car is over heating but I am unsure if this is the case. There is no loss of fluid or overflow activity. I replaced the thermostat but that had no effect. Thoughts?
Hello, KIa released a service bulletin regarding this issue. You will need a digital voltmeter to confirm. I will post the procedure here. If you need further assistance just let me know.
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