Where is the coolant temperature sensor located?

2004 OLDSMOBILE ALERO
200,000 MILES • 2.2L • AUTOMATIC
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HELENAHILL
  • MEMBER
  • 1 POST
Need to find the location of coolant temperature​sensor to replace it.
Jul 13, 2025 at 7:29 PM
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MECHTRIX
  • CAR REPAIR CONTRIBUTOR
  • 382 POSTS
Its usually on or near the thermostat housing on the cylinder head just follow the radiator hose to the engine it should be right around where the hose meets the engine it will have a 2-wire plug going to it . ..good luck
Jul 13, 2025 at 10:43 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,250 POSTS
Here is the location of the coolant sensor. Check out the images (below). Let us know how it goes.
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Jul 14, 2025 at 1:22 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.