Fluctuating temperature gauge

Tiny
JAM12345
  • MEMBER
  • 2011 CHEVROLET IMPALA
  • 3.5L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 220,908 MILES
My temperature gauge keeps on fluctuating, it starts in the middle and it almost goes up to the top. Back in May 2020 the water pump, radiator fan and new coolant were all replaced. What could this issue be?
Friday, December 18th, 2020 AT 5:14 PM

3 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Have you noticed if the car is overheating? Is it running at normal temperature or boiling over? Otherwise it sounds like you might have a faulty coolant temperature sensor. Here is a tutorial showing how a coolant temperature works and symptoms
for you to look at:

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

The coolant temperature sensor is located on the back of the engine near firewall in the back of the left cylinder head. I've attached picture steps below on how to replace for your car. It shows the location also. Hope this helps and thanks for using 2CarPros.
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Friday, December 18th, 2020 AT 8:41 PM
Tiny
JAM12345
  • MEMBER
  • 2 POSTS
My car is not overheating and it's running normal temperature, but it will get to normal temperature then it will get close to the H. I'm going to read more info about your answer. I appreciate it.
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Friday, December 18th, 2020 AT 10:23 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome!

Let us know if you have any more questions on this issue. Thanks again for using 2CarPros and we hope you will use our site again in the future.

Danny-
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Friday, December 18th, 2020 AT 10:27 PM

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