Question about Buick Rendezvous

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How do i change the Coolant Temperature Sensor on my 2002 buick rendezvous?

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  • cody314 Apr 27, 2010

    I dont really see it anywhere?

  • cody314 Apr 27, 2010

    Actually i found it but how am i suppose to remove it theres no way i can get a wrench down in there?

  • cody314 Apr 27, 2010

    I havent tryed to remove it yet i just know i could not get a wrench down there, Nor do i know if i can get a deep socket but i will try. Also is this the coolant sensor or the engine coolant sensor?

  • cody314 Apr 27, 2010

    thank you



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It should be located on the right side of the motor. Front of the thermostat housing. Follow the upper radiator hose. Then next to the housing next to the cylinder head. Has 2 wires should be yellow and orange/black. Just remove it with a wrench and reinstall opposite of removal.
Thank you,

Posted on Apr 26, 2010

  • Lee A.
    Lee A. Apr 27, 2010

    You may not be using the right tool then. Have you tried a deep socket? What tool are you trying to use? As the old saying goes where there is the will there is a way.
    Thank you,

  • Lee A.
    Lee A. Apr 27, 2010

    Yes the coolant temp sensor.



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Fix an overheating buick rendezvous 2002. Truly overheated once, then had the radiator flushed and replaced, along with thermostat (twice) and water pump. Now, the computer indicates it is overheating

You have a needle in a haystack because so many things can cause your problem. I am leaning toward the main computer - which you can replace yourself for around $300. There are companies on the internet that will send you your pre-programmed computer, you have to supply your VIN number. Like many internet companies I always recommend that you are careful in your selection. Be careful to find a reliable company and call them on the phone to make sure they are a real company. If they do not have a phone number - find a different company.

Here are a couple things to try first:
1) Coolant sensor - but this usually makes your car run really poor because it can change the gas/air ratio. If your car is running great other than the overheating sensor - then this probably is not the problem. But worth checking.

2) Serpentine Belt - sometimes when you change the serpentine belt you can put it back on the pulleys out of order. Your car can run great but can cause overheating especially if you have the water pump turning backwards. Since you had the water pump changed you might just take a look at the belt to make sure it is wound correctly. There should be a sticker under the hood.

All said -- I am still leaning toward the main computer.

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The low coolant light is always on in my 2002 Buick Century. The rad was flushed as well as the overflow container and the coolant level never drops. The needle of temperature gage is always at the mid...

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My 2002 Buick Rendevous has a hot coolant

Install the new thermostat (make sure it is the right temp). This will allow for your coolant to stay long enough in the radiator to cool down.

If that does not fix it, check radiator cap, belt that turns the water pump and the water pump itself along with its pulley.

There is also the possibility that the coolant temperature sensor is giving off false readings, that the coolant system is clogged or your engine fan is not operating when it should be.

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This code may mean one or more of the following has occurred:
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Check the following to see if it resolves your problem:
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  • verify cooling fan operation and replace if necessary
  • verify ECT sensor operation and replace if necessary
  • verify IAT sensor operation and replace if necessary
  • if all above checks out, replace the thermostat

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