So im having troubles with my 465 GTX.  I believe my thermal sensor may be shot because precision cannot read my GPU's temperature or adjust fan speed
 
My question is, are GPU thermal sensors located on the card, or the fan itself, and would replacing the stock fan fix my problem?
 

fubu442

So im having troubles with my 465 GTX.  I believe my thermal sensor may be shot because precision cannot read my GPU's temperature or adjust fan speed

My question is, are GPU thermal sensors located on the card, or the fan itself, and would replacing the stock fan fix my problem?

Is it only Precision which has this problem?  Have you tried GPU-Z to see if your fan speed and core temperature shows up?
 
Dissapearing core temperature and fan control was a common driver issue in the past.  I would recommend uninstalling EVGA Precision, uninstalling your video card drivers, and then reinstalling your video drivers and EVGA Precision lastly.
 
The thermal sensor is located in the GPU; you can't replace it.  Replacing the fan will do nothing.

Give this a try, man.....I have had to do this in the past and it worked very well. 
 
Open regedit then search and delete all instances of RmThermalProviderInfo and RmThermalProviderNum entries in the registry. Then reboot.
When you do your search for those entries and delete them...keep doing so until your search does not find anymore.
If I recall correctly...I had to search and delete 4 times in a row to get them all. When all have been deleted, then reboot.
 
Open regedit, make sure Computer is highlighted. Click on Edit Button on Menu Bar, select Find in drop-down list.
Put  RmThermalProviderInfo into the Find What box. Under Look At, make sure Keys, Values and Data are checked
then hit the Find Next Button. Be patient as it takes a few minutes for the search to complete.
You will then see a list with RmThermalProviderInfo highlighted and RmThermalProviderNum immediately below it.
Right-click on and delete each one. Then perform the search again and delete both again.
Keep searching and deleting until the search does not find anymore.
Then reboot your computer and the issue should be resolved.
 

reinstalling drivers and precision didnt work, deleting the 2 things from the registry also didnt work
 
Is there a way to test if a thermal sensor is dead or is the only way to know is by it doing what its doing to me?

Did you delete those 2 entries all 4 times like I said to?? If you do not delete them all....the issue will not resolve.

Well......bummer......I have no further suggestions, sorry.