05 aveo lt coolant temp low when car is moving

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Originally Posted by avguy

That was my first though also, but the OP said he replaced it, trying to fix this problem. So the old one, and the new both doing exactly the same thing? That would be quite a coincidence, but I guess it's not impossible.

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Could be wrong temperature on both. But I think he should do what you said first and go to a mechanic and get a reading on those hose temps. Take one before the thermostat and one after and see if there is a difference.

I have the same problem with mine.
Going to check with IR gun when home.
Yes, the under operation temp code keeps coming up.