Skip the auto shop - Our mechanics make house calls

Q: Temp gauge goes up and down

asked by on

The temp gauge in my car goes up and down. I changed the thermostat, radiator hose, and water pump. It doesn't overheat, but the gauge moves over toward the red and then moves back to cool side. I was told my temperature sensor might be out or bad.

A: Hi there. The temperature sensor is the dev...

Hi there. The temperature sensor is the device used to determine the estimated engine coolant temperature reading. The sensor itself is not always perfect. This device sends a signal to the computer and in some cases, the instrument cluster as well. A loose connection or malfunctioning sensor can sway the values and show an improper reading. If you need further assistance, I recommend you have a certified technician, like one from YourMechanic, inspect the electrical components to make sure all the connections are good and replace any failing parts

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Overheating car

Hello. I would strongly urge you to not continue to driving your vehicle in this condition. Continuing to drive your vehicle in this condition could cause damage to many components of your engine which would be costly to repair and/or...

Q: Oil light is on

There are a variety of possibilities that could be at play here. The oil light may have come on due to low oil pressure which may be what has caused the rattling you hear. If this is the case, there...

Q: I have been hearing a vibration in the back when accelerating it's almost like a clicking sound.

Hi there. The clicking sound/vibration in the rear of the vehicle upon acceleration could be, several possibilities. A loose wheel, a bad wheel bearing, a loose or broken suspension component. These are likely culprits but there are still more possibilities....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.