Question about 2006 Hyundai Sonata

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My internal thermometer shows eratic temperatures as I am driving the car. Why? How do I fix it? Can this be a problem for my cars performance?

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  • sswoods Feb 03, 2010

    It's the thermometer in the car that tells you what the temps are outside. It goes from 19 degrees to 130 degrees while I'm driving it. It's all over the place. Not correct at all.

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  • Hyundai Master
  • 5,568 Answers

> internal thermometer
Do you mean coolant/engine temperature or ambient air temp? If you mean the engine's operating temperature, then the temperature sensor is failing. This won't bother operation but you will also have no monitoring of operating temp in case something is awry with the engine.
Such sensors are fairly common failures and not terribly expensive to replace.

Posted on Feb 03, 2010

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  • Steve Allison
    Steve Allison Feb 03, 2010

    I couldn't even hazard a guess as to location of this sensor but it will not have any influence on the car's function.


    I highly recommend that everyone should own an aftermarket service manual for their vehicles since, even if you don't 'do it yourself,' it can give you an idea of the potential cost for a repair before you go to a service shop and can even help a shop if they do not have service literature on your car.
    We keep one with each of our vehicles.


    They are available online and from any of the chain auto parts stores for ~$25 or less.


    Service manual for 2006 Sonata

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