Why does my temp gauge go to C while driving??

Asked by Dec 18, 2014 at 05:31 PM about the 1994 Toyota Corolla DX

Question type: Maintenance & Repair

1994 Corolla DX 1.8L, Will start in morning & will heat up a little but once I start driving, temp gauge does right back down to COLD!! Yes, I have checked coolant level & when I am in traffic (stop/go) tem will go back up! Please help...

2 Answers

430

You may want to check your thermostat it may be stuck open and the coolant temperature sensor isn't able to sense temperature raise because the coolant isn't getting hot in your radiator.

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5,375

I would think about finding the water temperature sending unit on top of the engine and check the wiring from the top of it and follow it as far back to the car as you can to see if it's against something that would get hot when the engine warms up Otherwise, consider maybe the temperature sending unit may be going out.

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