Question about 2003 Saturn VUE

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Check engine light on

2003 saturen vue we just bought it used and the code shows a over cooling problom the thermostat can not controll any help would be great thanks for the help.

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  • bigdaddy_081 Jan 04, 2009

    the cheap scaner i have had a code for the stat wont control the temp the fan is not staying on all the time and not shore were the stat is on a 2003 saturen vue the heater gets warm and the temp with a heat gun is around 165 to 170 doesnt seem up to temp but a saturen is a differnent type of engine a little cant find a good tech manual ur help is in great help.

  • Richard Scordino May 11, 2010

    What do you mean "that the thermostat can't control"? Is the thermostat operating or is it stuck open? Does the temp come up to normal ? (how about the heater... is it blowing hot? Does the electric radiator fan stay on or is it operating normally?

  • Scotty
    Scotty May 11, 2010

    Some additional information may help diagnose the issue if you could please provide it.

    1. What was the code specifically
    2. What engine do you have in this vehicle.

    Once you post up that information I will do my best to help out.


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  • Saturn Master
  • 6,982 Answers

Heater temp is a bit low but I don't know what the ambient temp was when you tested (the colder the outside air, the cooler the blower temp will be.) I'd definitely change the thermostat before doing anything else. Todays engines run @ about 210 degrees. If you've got a 160 thermostat in there, it won't ever get there. (will also mess with mpg.) Even the cheapest manuals contain locations for stuff like that. Everyone keeps changing locations, and I haven't worked on this stuff for a while, so I can't give you a location.
Yes there are other possible causes to your problem (blend doors etc) but I'd stick to the simple common stuff first!

Posted on Jan 04, 2009

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