Where is the block temperature sensor located?

2010 CHEVROLET AVEO
55,165 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
Avatar
D. GILLEY
  • MEMBER
  • 1 POST
My temperature gauge quit working, at the same time the a/c quit working, i assumed that it was the temperature sensor, i went to the part store to get a sensor, and found out there were three sensors for this car, they said the one that controls the gauge is in the block, but i couldn't find it. The only videos i could find said it was under the intake on the back side of the block. i have been all over this thing but i can't find it. Please help!
Jan 28, 2025 at 1:53 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
The temperature gauge works from the data of the PCM. here is the location of the engine coolant temperature sensor so you can swap it out. It looks like it is on the backside of the engine under the intake manifold so it might be a little tough to get to. Check out the images (below). Please let us know what happens.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Jan 29, 2025 at 9:32 AM
Avatar
BORIS K
  • ✓ASE Certified Mechanic
  • 836 POSTS
  • ASE Certified Mechanic
Hello,

The ECT sensor, Engine Coolant Temperature sensor, is located behind the engine under the intake manifold.
There appear to be several versions with the sensor being near the alternator and the other more in the middle under the intake manifold,

It has a 2-wire connector with pin 1, brown wire and pin 2, white wire.

See image below.

Hope this helps.

Cheers, Boris
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Jan 29, 2025 at 9:34 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.