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there is a sensor in the bottom of the coolant bottle, change this and you should be o.k. tap the sensor with a screw driver it will go out uts just stuck
The coolant level sensor is faulty.
Have you checked your temperature? There are two sensors one is for coolant level, and other is for temperature. First make sure your not over heating, then disconnect your coolant level sensor located on your coolant tank, and disconnect it. If light goes out, this may be your problem. Although I am not one hundred percent sure this would work as way of testing, because the circuit for level sensor may only come on when circuit is broken. This means you would have to do a jumper wire in the plug for level sensor, and see if light goes out.
Check your coolant level again to see if the level has gone down. If it has check your engine oil level to see if it is above the normal full line. If it is this might mean you have a bad head gasket. I had a 92 grand prix that was not over heating but i was losing coolant, bad head gasket.
The best place to start would be to check the coolant level in the radiator. If the coolant level is low, fill to full level. If the engine is not reaching the normal operating temp, then the thermostat is bad. Just replace the thermostat with a new one.
Check your overflow bottle to make sure there is adequate coolant in there. If there is, the coolant level sensor is faulty and must be replaced.
Varies by vehicle. An older vehicle, it might just be a coolant temperature gauge, or some might have a small light on the gauge to get your attention which is triggered by that gauge peaking.On current medium- and heavy duty vehicles, where the engine will shut down to prevent damage from overheating, the red engine shutdown light will come on, and this might be accompanied by a specific coolant level light in the instance where it's due to low coolant. This is also typically accompanied by an audible alarm and an in-dash display which will show a message such as "low coolant level".That would be two separate warning lights on some vehicles. One for the engine coolant temp being too hot and the other would be for engine coolant level is low.
Check the engine coolant level. My 2004 would blow cold at a stop light, then warm by the next light. The top radiator hose was leaking causing the level to be low.
bad sensor
The normal direction of circulation in the coolant system would push the coolant out the thermostat opening.
This is actually the Low Coolant idiot light. Pop the hood check the coolant level, when designing the level sensor, the engineers screwed up and it throws the light even when the tank is up to the MAX line. Just add your coolant water mixture till the light goes off, making sure there is still some room in the tank for overflow once the fluid is heated.
If it is the low coolant light, it may mean your coolant is low. If it is not low, it may be the low coolant light sensor malfunctioning.