Question about 2005 Chevrolet Impala

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Temperature gauge pegs out at 260 and the fans are not working

How do I repair the problem

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Check under the hood in the fuse block for the fan relay maybe bad; if not run two wires from the battery to the plug on fans to see if they work and replace as need.

Posted on Nov 20, 2008

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I have a 1996 chevy lumina and the temperature gauge keeps moving around unpredictably. The fans wont come on. We checked the fuses and relay switch. Could it be the fan motor, or temperature gauge


The gauge is supposed to move. Between 190 and 210 degrees. About a 1/16 to 1/4 inch movement with the needle. If it goes from middle(200 degrees) to hot(260 degrees) and back. Check the coolant level. Air pocket in the engine. Low fans come on at about 210 degrees. High fans come on at 225 degrees. High fans come on when the A/C is turned on. And it works.

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I have Envoy 2005. While my car is parked, not turned on, the Temperature Gauge is staying at level higher than 260. Can I change the Temperature Gauge alone, or i have to change the Instrument Panel?


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I Have a 1997 Pontiac Grand Prix, For months now my temperature gauge has been running hot to nearly 260 degrees. The car has never officially overheated although the fans do kick in, In the last few...


What's chances that the temperature gauge or sender itself is wrong?
Is the heat exceptionally hot? What temperature is the heater dicharge when the gauge reads 260?
I think that the sender is not expensive, try that. An auto parts store could get you an inexpensive dial gauge that you might be able to install in place of the sender.
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Temp. gauge reads high some times. but the motor really isnt hot


It sounds like the coolant temperature sensor is beginning to fail. It is highly unlikely that the in-dash gauge is a problem. The coolant temp sensor inputs to the computer affecting everything from radiator fan speed, engine fuel/air calibration and a variety of other parameters.

Be absolutely certain to "burp" every bubble of atmosphere from the coolant system too. Air bubbles have the amazing ability to prevent coolant flow and will cause all sorts of problems, especially if the bubble wants to hang around the temperature sensor location.

Normal operating temperature is going to be around 210 F.

Most Autozone, Advance locations will read engine problem codes at no charge, so drop by one of those locations and let them read the problem code.

My guess will be the coolant temperature sensor. Then have the problem code reset, remove all air from the coolant and let us know how this worked.

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The electric fans on some vehicles dont stay on all the time. If the radiator is not burningyou then i would suspect the guage is bad. The engine would throw a code if the fan was not working properly, so im pretty sure that your fan is working properly. I hope that helps you out.

Nov 21, 2008 | 2005 Chevrolet Impala

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