Where is the Engine Coolant Temperature Sensor located?

JAYP40528

MEMBER
2022 CHEVROLET TRAILBLAZER
1.3L
2WD
AUTOMATIC
67,000 MILES

I am trying to figure out where the engine coolant temperature sensor is located on my vehicle listed above RS and how difficult would it be for me to replace it myself?

Thursday, January 11th, 2024 AT 11:15 AM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

There is more than one. One is used by the engine's computer (PCM) to control the air/fuel mixture (screwed into the engine block), and there is one in the radiator for the cooling fan operation.

It is really easy to replace. You will need to drain the coolant to below the height of the sensor so coolant isn't lost. Then it is nothing more than disconnecting the electrical connector and using a deep well socket, unscrewing the sensor, and screwing the new one in place.

If you want to do it yourself, I'll be here to help if needed. Also, if you tell me the symptoms you are experiencing, I can better point you in the right direction of the sensor in question.

Let me know.

Joe

See pics below.

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Thursday, January 11th, 2024 AT 8:23 PM

JAYP40528

MEMBER
2 POSTS

Thank you, the information is very helpful. So, the symptom I experienced was my check engine light coming on. I took it to Orielly's and they were able to tell me the light was due to engine coolant temperature sensor. If possible, could you show me a picture of what the one I would need to replace looks like?

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Thursday, January 11th, 2024 AT 10:10 PM

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

By chance, do you have the code they retrieved just so I can confirm? I suspect it is the one I mentioned above.

As far as what the sensor looks like, I attached a pic below.

Let me know if this helps. Also, if you have the code they found, let me know that as well. It's odd for this to set a code and I can confirm if they are correct.

Take care,

Joe

See pic below.

Image (Click to make bigger)