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Temp gauge is all the way up

Tiny
NV_2087
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
  • 229,000 MILES
I have a 1998 pontiac grand prix 3.8 my coolant fan does not work but it does work with the ac I already changed two out of the 3 relays and got nothing so I changed the coolant temp sensor and my temp gauge is all the way up way way up and I know my car

Coolant fan not working and changed coolant temp sensor and my gauge is all the way up even tho my car is cold and won't go back down.
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Thursday, January 12th, 2012 AT 1:04 AM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
If you unplug the sensor will the gauge drop all the way down?Any codes in the computer?
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Thursday, January 12th, 2012 AT 1:09 AM
Tiny
NV_2087
  • MEMBER
  • 2 POSTS
I think it might have been a defective ECTS because I bought another one at a different merchant and now it reads at it should but my fan is still not working
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Thursday, January 12th, 2012 AT 12:24 PM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
There is a seperate sensor for the fan operation.
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Friday, January 13th, 2012 AT 2:17 AM
Tiny
NV_2087
  • MEMBER
  • 2 POSTS
Where is it?
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Friday, January 13th, 2012 AT 3:36 AM
Tiny
AAWESOME XANDER
  • MEMBER
  • 1 POST
I am having the same problem with my 98 grand prix.
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Tuesday, February 7th, 2012 AT 6:29 PM
Tiny
PHILLIPALANHILLIS
  • MEMBER
  • 1 POST
I had that same problem and just drove it it fixed its self
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Sunday, February 3rd, 2013 AT 5:23 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
It is right below the throttle body on your vehicle.
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Sunday, February 3rd, 2013 AT 1:24 PM

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