Skip the auto shop - Our mechanics make house calls

Q: my temperature gauge rises slowly when its in drive and idle. once i start driving, it quickly drops. what could be the issue?

asked by on

When i start my car waiting for it to warm up everything is fine. About 5min into my drive my temperature gauge rises when i am stopped on the street for long periods. Once i drive off the gauge immediately drops to operating temperatures. My heat runs warm turned up. And a good portion of coolant from my radiator fills my reserve tank from between L and F to Full
My car has an automatic transmission.

A: Hi there. From the description you have pro...

Hi there. From the description you have provided, this could be an inoperative radiator cooling fan issue. Turning on the a/c, this should turn the radiator cooling fan(s) on, which would help identify whether the cooling fan(s) are capable of turning on. If, the fan(s) turn on, then it could be a faulty coolant temperature fan switch. If, the radiator cooling fan(s) don’t come on with the a/c on, it could be, a blown radiator cooling fan fuse. It could be, a faulty radiator cooling fan relay. It could be, a faulty radiator cooling fan motor. I recommend having your vehicle’s temperature gauge be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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: Car only starts when I pump the gas pedal.

From this description it seems that there could be separate issues happening to your Mitsubishi Eclipse. The three most common reasons I see for a car unable to start without pushing the gas pedal include; the throttle body gasket may...

Q: Faulty sensors preventing startup

Hello, from what you are describing, I am assuming that you are referring to your crankshaft sensor. Before replacing parts, you should have the car scanned for codes and data monitored. If there are no codes, the crankshaft RPM can...

Q: car temperature drops while driving and doesn't warm back up, then if I turn the car of it won't immediately restart.

Hello, thank you for writing in. Due to the recent repairs that have been done, you need to have them verified. If the thermostat was installed improperly, or the system was damaged before or during, then you may have these...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...