SOURCE: 2003 Hyundai when driving and stopped in
A stuck thermostat can cause this, replace it.
I would also check for proper coolant level and check the engine fan to see if it is working.
SOURCE: my engine temp gauge goes
I would assume that the sensor is probably doing EXACTLY what it is designed to do....measure engine temperature! An engine will get hot when sitting in traffic if the radiator cooling fans are not working. The engine temperature will then go back down when the vehicle starts moving and air begins to flow through the radiator.
Get your radiator cooling fans checked!
Please also review this article: What Else Could Be Wrong?
SOURCE: my temperature gauge rises moderately
Help me out here.... which Hyundai vehicle are we discussing (it would be a great help). However, you describe an issue I've seen with electrical systems on Hyundai cars. You may have an electrical issue dealing with wiring 'ground' connections and/or the main power cable between the alternator and battery. Have a qualified Hyundai Service Technician properly diagnose
your vehicle. OR you can Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals, service bulletins, illustrations, etc.
http://howtobyme.blogspot.in/2012/05/2004-toyota-tundra-oil-gauge-and-temp.html
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http://schematicsdiagram.blogspot.in/2012/04/temperature-gauge-sits-over-half-way.html
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http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html
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http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html
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Prix?
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http://technoanswers.blogspot.in/2012/02/dodge-neon-gauges-not-working.html
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Heater blows cold?
http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
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Heat blows cold on drivers side and hot on
passenger side?
http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html
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Antifreeze out of reservoir and heater Blows Cold Air?
http://whatisbyme.blogspot.in/2012/05/1992-lexus-ls400-engine-overheats.html
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These details will help.
Thanks.
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