Skip the auto shop - Our mechanics make house calls

Q: What makes a car's temperature normal at idle but hot while driving? - 2000 Chevrolet Malibu

asked by on

What make car run hot while driving?

My car has 163 miles.
My car has an automatic transmission.

A: This may be related to a few different thin...

This may be related to a few different things, such as a clogged radiator not allowing coolant to circulate properly, a thermostat that may be stuck closed not allowing coolant to flow through the motor, or potentially a bad coolant fan switch that may be operating erratically or intermittently.

When a thermostat is stuck closed, this does not allow coolant to pass through the engine when the coolant reaches the specified temperature. Coolant fan switches are also designed to trigger the cooling fans to come on the same way when the coolant reaches a specific temperature. When this switch is faulty, this may cause them to come on sometimes not at all or intermittently.

You may want to consider having a professional mechanic, such as one from YourMechanic, come to your location to perform an inspection into why the car is running hot and suggest any necessary repairs.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: What am I doing wrong

I would suggest you have the system pressure tested and the exact leak pinpointed to make sure you do not have a crack in the head or block where it is leaking. Only a pressure test will indicate where the...

Q: Car turns off for a second or two while at a stop

This may be caused by many different things, however what is most common given this kind of symptom may be a dirty or failing idle air control valve. This is a unit that monitors air intake as it is mixed...

Q: My car won't start - Chevrolet Celebrity

Hello - A bad engine coolant temperature sensor is a reasonable diagnosis; it could certainly cause the engine to run too rich if it's sending a bad signal to the engine computer. Before purchasing a new temperature sensor, you can...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.