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 12:29 PM
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MECHTRIX
  • ✓Experienced Mechanic
  • 570 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 3:43 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,604 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 6:22 AM
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