Skip the auto shop - Our mechanics make house calls

Q: Temperature gauge maxed out

asked by on

Hello, so I had the check engine light came on and I had the codes checked out and it was a thermostat replacement, so I did that, replaced the thermostat, reset the computer and the check engine light has yet to come back on, the problem I'm having now is the temp gauge is maxed out on hot, but after running the car for a while, the car doesn't seem to be over heating but that gauge is killing me, heard something about a temperature sensor switch under the thermostat housing and was wondering if that was the problem, I know you can test it with a currency meter but I have not done this yet, any ideas?

My car has 145000 miles.
My car has a manual transmission.

If the temperature gauge is pegged all the time, the problem is electrical. While the issue could be with the gauge or wiring, the most likely cause is a failed temperature sending unit. The sending unit is located to the side of the thermostat housing on the driver’s side of the engine. It’s possible that the sensor or connector got damaged or disturbed during the thermostat replacement. If you decide to have a professional diagnose and repair your temperature gauge, the team at YourMechanic would be happy to help.

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!
  1. Home
  2. Questions
  3. Temperature gauge maxed out

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: My temperature goes up higher when I'm driving

Hello. There are several possibilities here for overheating. These range from the thermostat simply failing in the "closed" position, to a clogged or corroded radiator, a radiator fan (electric) is not coming on when it should, or the engine having...

Q: Tire slowly goes flat.

Hello, the only way to find a leak on a rim and tire is to remove the wheel from the car and then submerge it in a tank of water to see if there a leak. While submerged, the mechanic...

Q: Car jerking and surging as it accelerates

Hi there. This problem can be caused by a few things. First, your vehicle may be having trouble getting fuel to your engine. This would mean that there is an obstruction in your fuel lines or your fuel filter. Next,...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...