Coolant temperature sensor?

Tiny
TRICE3KDS
  • MEMBER
  • 2006 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 97,000 MILES
How to replace the coolant temperature sensor on 2006 Pontiac grand prix?
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Monday, December 20th, 2010 AT 3:02 PM

13 Replies

Tiny
SATURNTECH9
  • MEMBER
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT

REMOVAL PROCEDURE

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

1. Partially drain the cooling system. Refer to Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (L26, L32 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) in Cooling System. See: Engine, Cooling and ExhaustCooling SystemService and Repair
2. Disconnect the ECT sensor electrical connector.

3. Remove the ECT sensor.

INSTALLATION PROCEDURE

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

1. Coat the threads with sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent.

NOTE: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

2. Install the ECT sensor.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the ECT sensor to 25 N.M (18 lb ft).

3. Connect the ECT sensor electrical connector.
4. Fill the cooling system. Refer to Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (L26, L32 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) in Cooling System. See: Engine, Cooling and ExhaustCooling SystemService and Repair

Turns out the 2006 Grand Prix (at least with the 3800) required the removal of part of the exhaust to even get to the sensor.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Monday, December 20th, 2010 AT 8:55 PM
Tiny
CAMARO_74
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
My 04 pontiac grand prix gt egine cooling fans turn on late. I changed the coolant temp sensor but still the same. The temp gauge reads a little over 3/4 of the way when the fans turn on. What else can be the cause for this.
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
2CEXPT
  • MEMBER
Could be the computer controlled of the relay-also try replacing the engine thermostat and see what happens it controls the engine temperature sensor.
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
CAMARO_74
  • MEMBER
I changed the thermostat and its still the same. The fans don't come on til after the temperature is between the 3/4 and the red zone. Could it be the fan relay
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
2CEXPT
  • MEMBER
Try swapping it with a like one and see what happens-don't work double check wiring at the CTS, Fan relay-if okay could be the computer control circuit of the relay-
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
DELTA101089
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 107,000 MILES
I'm having an issue with my engine overheating and am replacing the thermostat and sensor. I've located the thermostat but where is and how do you replace a coolant temperature sensor?
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
HMAC300
  • EXPERT
There is a sensor right by the thermostat. But there may be 2 1 for the computer and the other for the fan. I't s a simple disconnect the wiring harness and unscrew it and put another in.
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
CHUKER1959
  • MEMBER
  • 2002 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
My Service Engine light came on. I took car to Auto Zone they hooked it up to the machine and told me my Coolant Temperature Sensor was bad. I have located the part at the dealer and surprisingly it isn't too expensive.

I need to know where this sensor is located on my vehicle so that we can replace it. Is this a job that we can do ourselves?
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
2CEXPT
  • MEMBER
Yes you can do it-look below its for a 3.8 liter engine.


https://www.2carpros.com/forum/automotive_pictures/12900_cts_4.jpg

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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
CRAIGPLURIE
  • MEMBER
  • 2002 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 94,321 MILES
What steps are required to change the low coolant sensor on my 2002 pontiac Grand Prix? Due to the location of the sensor in the radiator I am worried there is more to replacing the switch than just taking it out and putting a new one in and replacing the lost fluid.
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
ZACKMAN
  • MEMBER
That is it. You are over-thinking it. Relax.


https://www.2carpros.com/forum/automotive_pictures/55316_02gpcoolant_1.jpg

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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
RICKEYHART
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Where might the sensor be located on my vehicle
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Friday, September 11th, 2020 AT 11:53 AM (Merged)
Tiny
MERLIN2021
  • EXPERT
It's on the top left rear of the engine below the throttl body.


https://www.2carpros.com/forum/automotive_pictures/62217_ECT38_1.jpg

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Friday, September 11th, 2020 AT 11:53 AM (Merged)

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