Question about 2001 Chevrolet Cavalier

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Car not overheating but serious temp spike when not driving at high speeds...let idle in driveway and temp went up to red...coolant fan not turning on...

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Check to see if your fan is coming on check fluid levals check to see if your thermostast is stiching closed hope this helps and last of all check your water pump.

Posted on Aug 30, 2010

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Posted on Jan 02, 2017

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Cooling fan is acting strange car is heating some when idling how can I trouble shoot or fix


It is normal for a temperature gauge to fluctuate when the car idles, you will notice 20 to 50 degrees bounce. As long as it is not going into the red or blowing steam don't worry about it.

Oct 26, 2015 | Cars & Trucks

3 Answers

2004 hyundai elantra.. car had coolant leak the other day and temp gauge went past red lines. Leaking out the passenger side front of car, round piece with hole in it.. bf put stopleak in it and filled...


Let's go over a list of things here and get everything organized. Most cars have an "open" coolant system, meaning that if it gets too hot (thus increasing the pressure inside the coolant system), the reservoir or radiator cap will open up and allow that pressure to release, or the coolant to expel - which would cause you to spill coolant.

After it cooled down, you were able to drive it for 70 miles - presumably on the highway/interstate/freeway, or another road that may not have a whole lot of stopping.

Then you started driving in town, most likely with stoplights or stop signs. The car overheated then and you weren't able to get it restarted (which is normal and is a safety feature on a lot of cars).

Fluids are good, the fan is kicking on, and the belts haven't broken.

Okay, so you actually did a pretty good job narrowing this down (assuming I didn't miss anything). The car is doing it's overheating when you're in stop and go traffic, with low airflow. If you are running your air conditioning, try turning it off and see if that keeps you from overheating (assuming the car starts now). If it does, then chances are your fan isn't kicking into high-speed. On some vehicles, you have two fans, on others you only have one. If you have two fans, one will only kick on when the AC is running. If you have one fan, it should have two speeds. A low-speed for simply cooling the engine, and a high-speed for when the AC is running.

If you don't overheat when the AC is running, check your relay box under the hood and search for a relay that should be labeled something along the lines of "Fan 2", "Fan High", "Fan AUX", or "Fan AC". If you find one, replace it or try switching it with another relay. Good luck!

Jun 02, 2014 | Cars & Trucks

1 Answer

Mitsubishi Lancer 2006 cooling / rough idle issue


Sensors do not always throw codes if they are close to normal parameters, needs to be checked with a scan tool and thermometer.

There is usually a high and a low speed fan relay, as well as a separate A/C fan relay (also high) Your High speed fan relay could be bad, or the fuse for it.

Engine idle surging usually means the coolant is boiling and there is no longer liquid in the throttlebody causing it to go to a high idle because it thinks the engine is cold. Warm coolant closes a valve lowering the idle on most Japanese makes of that year.

Also, sometimes Thermostats stick half open and do not allow enough flow. AND sometimes in neglected cooling systems Water pump Vains are eroded by electralosis causing low coolant flow as well. And a Clogged radiator can also cause this, as by the time the fans run on high it's to late.

May 22, 2014 | 2006 Mitsubishi Lancer

4 Answers

My cougar is overheating today sporadically, going from normal to high and back as I drove today. I don't see any signs of leakage or hissing in the engine compartment area, indicating a hose problem. ...


sounds like your coolant level dropped enough to empty the heater core and your engine was not getting coolant up to the cylinder head, check the coolant immediatly and fill then idle in the driveway till fully warm and you should notice the leak

Mar 06, 2011 | 2000 Mercury Cougar

1 Answer

05 Silverado, overheats when in 4-wheel drive under strain. Fixed once(so I thought) by replacing the water pump and thermostat. Happened a few months later. Again, 4-wheel, under strain. Wound up...


Instrument cluster - GM had problems with a part inside the cluster , Stepper motor , These faulty step motors caused the gauges to act erratically . 2003 to 2006 ! ALL GM vehicles . Just replaced a cavalier instrument cluster for what customer thought was a over heating problem .The fans come on low speed when engine temp. reaches 220 degress
The PCM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF if the engine coolant temperature at key-off is greater than 101°C (214°F) the low speed fans will run for a minimum of 60 seconds After 60 seconds, if the coolant temperature drops below 101°C (214°F) the fans will shut OFF. The fans will automatically shut OFF after 3 min. regardless of coolant temperature.
The PCM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 107.2°C (225°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set.
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed if required. This insures idle stability by preventing the fans from cycling between high and low speed.

Mar 31, 2017 | 2005 Chevrolet Silverado

2 Answers

The cooling fan on my 2001 ford escort SE will not work normally


Check the coolant temperature with the car stopped. At idle with the hood up keep the thermometer in the coolant. Confirm if the coolant is not overheating but the engine is!!

Run the A/C keeping the thermometer in the coolant and allow the fan to kick on.

If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Read the description of the Taurus where the low speed is used for normal operation when temperature is required but the high speed is activated when the A/C is on. The circuit is simple.

In your case the low speed has to be activated for the A/C to go into the high speed. The fact that the high speed is working and low speed is not indicates the low speed of the fan is defective.

Other problems such as the thermostat or plugged cooling system(radiator clogged) could be the root problem!

Hope this helps?
2010-09-05_004249_03_focus_cooling_fan_resistor-3xudhdxidxafwe4mdbsnm14c-4-0.jpg

dual_speed_fan_diagram-3xudhdxidxafwe4mdbsnm14c-4-2.jpg

Jun 24, 2017 | Ford Escort Cars & Trucks

2 Answers

Coolant temperature gauage spiking


replace the thermostatic sensor switch ,but where it is on this vehicle i have no idea ,honest never seen one here in spain

Mar 18, 2010 | 2005 Chevrolet Equinox

2 Answers

Temp Gauge went to high


It could be 3 things: Temp sensor, thermostat, or fan relay. Fans don't usually turn on until car has been idleing for a while. I first would change thermostat, then relay, then temp sensor. Coolant must be 50/50 mixture for water pump to have proper lubricant from antifreezer. Do not go any further than a 60water/40antifreeze mix

Jul 08, 2009 | 1999 Honda CR-V

1 Answer

Gauge reads Hot but truck doesn't appear to be overheating - help


is antifreeze dirty looking and if was changed was it chemically flushed?

Jul 06, 2009 | 2002 Nissan Frontier Crew Cab

1 Answer

96 cavalier overheating


You have a front wheel drive car so it requires and electric fan motor which in turn requires a temp sensor to tell it to turn on. The sensor should be on the radiator itself. Check that the connector to the senor and the motor are tight and if the wiring checks ok then I'd go for the sensor first.
The reason it cools while driving is the natural flow of air at driving speed.

Jul 16, 2008 | 1996 Chevrolet Cavalier

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