Check radiator fan relay and sensor.
If the cooling fans are working then probably cracked radiator
SOURCE: 2000 Honda Accord - engine overheats when stopped
There are only a couple things you can check. First, I would make sure the gauge is reading properly by checking the fluid temperature manually. Newer model cars have temperature sensors that can malfunction but they will usually set your check engine light off it that is the case. Check your radiator fluid. While the engine is cold!! See if it looks dirty. Rub it between your fingers and see how viscous it feels. Make sure the radiator is full. You may just need to get your radiator flushed. A lack of flow will cause an overheating condition. When your back in motion the engine has more pressure to circulate the fluid. When the car is moving there is airflow that also aids in the cooling process as well. Other than that you have a thermostat which could be sticking and causing it to overheat. Or the water pump is bad. A flush and fill and replacing the thermostat are fairly cheap and usually a lot easier to do than replacing the water pump. Especially on a Honda. Usually you will hear a squealing noise if your water pump is going out and there is, I think it is called a weep hole on the pump itself that will start to leak when the pump is going bad.
SOURCE: Car Overheats after 12 to 15 minutes of running. Temperature decreaes when I accelerate.
your fan is the problem...it's not turning fast enough to cool the engine off. I need more info on what type of fan you have....elec fan or a clutch fan?
SOURCE: Both radiator cooling fans won't turn on vehicle overheats
The fans come on only when hot or the AC is on. There are many fuses that have to be good for it to work. The fan relay should have 2 pins hot with the key on, The other 2 should be ground. with the key off one should be hot and the other can then be ground the other pins that are ground one of them is the fan. the other becomes ground when the computer turns the fans on. If you don't have a pin thats hot at the relay all the time then theres a blown fuse or even the power wire from the battery at the battery
SOURCE: When idling my jeep overheats. The cooling fan is
At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.
Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.
If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?
It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.
Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.
Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..
The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.
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