Where is the coolant temperature sensor located?

Tiny
HELENAHILL
  • MEMBER
  • 2004 OLDSMOBILE ALERO
  • 2.2L
  • AUTOMATIC
  • 200,000 MILES
Need to find the location of coolant temperature​sensor to replace it.
Sunday, July 13th, 2025 AT 7:29 PM

2 Replies

Tiny
MECHTRIX
  • MECHANIC
  • 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
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Sunday, July 13th, 2025 AT 10:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Here is the location of the coolant sensor. Check out the images (below). Let us know how it goes.
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Monday, July 14th, 2025 AT 1:22 PM

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