Why does my coolant light come on when full?
The most common reason for the coolant light to become illuminated is simply that the coolant level is too low. There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. Low coolant levels are usually caused by leaks, either in the reservoir or somewhere in the lines.
Why does my coolant light come on when it’s cold?
The coolant light glowing blue when you start your car is a warning that the engine isn’t yet up to its optimal running temperature—so don’t push the engine hard. Doing that when the engine is cold can reduce the longevity of the car’s engine.
What does it mean if my coolant keeps getting low?
The most likely culprit for low coolant levels is a leak somewhere in the system. Below, we’ll dive further in the types coolant leaks that could be present, how you might be able to detect some leaks and list a few of the other, less likely causes of a low coolant light that don’t have to do with a coolant leak.
What problems can low coolant cause?
Your engine could overheat. Coolant helps pull heat away from the engine. So, without enough coolant, the engine could overheat or seize up. Continued use of an overheated engine could lead to permanent damage, such as pistons welding to the cylinders.
How often does coolant need to be topped up?
You need to check your engine coolant at least twice a year before summer and winter, ideally. Although, this advice may vary between car manufacturers. Coolant should be topped up whenever the level drops below the guide marks.
What do I do if my temperature warning light comes on?
If the temperature light goes on or if the gauge enters the red zone immediately pull off the road to a safe spot, well away from traffic, and stop the engine. Wait 20 minutes, start up the engine, and if the temperature light comes on, proceed directly to the nearest garage with a mechanic.
When does the low coolant level warning light go out?
When you start the engine, the low coolant level light should come on for a second or two and then go out. If it doesn’t go out, either the coolant level is too low or there is a problem with the sensor system.
What happens if the coolant level in the reservoir is low?
If the coolant level in your reservoir is very low, below the “Min” or “Low” mark, there’s a decent chance you have a leak somewhere. We’ll get to that in a minute — but there is always the chance that you just need to add more coolant.
What do the coolant levels on my car mean?
It will have levels marked “Min” and “Max,” or “Low” and “Full,” that indicate the actual coolant level when the vehicle’s engine is cold. Your owner’s manual has the correct information for your vehicle.
What to do if your Radiator is leaking coolant?
If not, the worn hoses should be replaced. If your radiator cap and hoses are fine, but there are coolant leaks around the engine, or coolant puddles on the ground, you could have a faulty radiator, water pump or thermostat housing. Solution: Get your vehicle to a mechanic immediately. Have it towed if necessary.