QA

Quick Answer: Why Does My Coolant Light Keep Coming On

The most common reason for the coolant light to become illuminated is simply that the coolant level is too low. You may need to book a coolant change. Low coolant levels are usually caused by leaks, either in the reservoir or somewhere in the lines.

Why did my coolant light come on and off?

If the coolant level indicator, turns on and off for no real reason this means that your car’s sensors have failed. A malfunctioned coolant sensor may lead to a diminution in fuel efficiency or it may even lead to improper emission readings. The reason behind such defective sensor would be a probable loose connection.

Can I drive my car if the coolant light is on?

The coolant pressure warning light is an important one – your vehicle is telling you that your engine is overheating due to low coolant. If this light has turned on and you’re wondering if you can continue driving, the answer is you shouldn’t. An overheating engine can lead to engine damage which can be costly repair.

What do you do when your low coolant light comes on?

The easiest way how to fix low coolant is to begin filling your coolant back to acceptable levels and allow the coolant to soak back into the system. Upon opening your radiator cap, you will see indicators such as “max” and “min” which indicates the level of the coolant mixture currently in your tank.

How often do you top up coolant?

Although, this advice may vary between car manufacturers. Coolant should be topped up whenever the level drops below the guide marks. When it comes to draining and changing the coolant altogether, manufacturers guidance also varies although this can be after a minimum of 30,000 miles depending on how old your car is.

How often should you change the coolant in your car?

Regular flushing keeps the coolant clean and prevents blockages. HOW OFTEN SHOULD YOU FLUSH THE COOLANT? Depending on the vehicle and the coolant, the average time between flushes is two years or 30,000 miles for silicated coolants and up to five years or 100,000 miles for an extended drain coolant.

How long can I drive with my coolant light on?

So long as “low” is still enough coolant to circulate, so long as the temperature gauge doesn’t go “red” you should be fine. You may have to stop often and cool off the engine.

How long can you drive after coolant light comes on?

Four or five minutes of full throttle operation with little or no coolant is virtually guaranteed to destroy an engine. Ten minutes or more of normal driving with very low or no coolant will likely result in major engine problems.

Can I use just water as coolant?

Yes, you could use water as a coolant in an emergency. However, doing so is not recommended since water won’t work well beyond its freezing and boiling points. This could also cause expensive engine damage.

Why is my coolant low but no leaks?

When you are losing coolant but no leak is visible, several parts could be the guilty party. It could be a blown head gasket, a fractured cylinder head, Damaged cylinder bores, or a manifold leak. Any trace of exhaust gases in the coolant.

Is coolant the same as antifreeze?

Engine coolant, also known as antifreeze, is mixed with water to keep the radiator from freezing in extreme cold and overheating in extreme heat. There are many different types of coolant, so it’s important to know what variety is right for your car or truck.

How do I know if I have a coolant leak?

Clues You Have an Antifreeze Leak A sweet aroma that you notice from outside the vehicle, coming from the vehicle after you’ve driven it. You might be able to smell it from behind the wheel as well. Puddles under the car of lime-green, orange, pink, or blue-green after you’ve parked.

Can I add coolant to reservoir when engine is hot?

No, you cannot add coolant right away while the engine is still hot. You need to wait for 30 to 60 minutes or until the engine cools down and the pressure subsided before adding your coolant.

What happens if you never change your coolant?

The coolant can become more acidic over time and lose its rust-inhibiting properties, causing corrosion. Corrosion can damage the radiator, water pump, thermostat, radiator cap, hoses and other parts of the cooling system, as well as to the vehicle heater system. And that can cause a car engine to overheat.

How much does it cost to replace engine coolant?

The cost of a coolant or antifreeze change will depend on the type and size of your vehicle. On average you can expect to pay between $100 and $200 for a standard coolant change.

Can I just add more coolant to my car?

There is no problem with just topping up the coolant. You can add the coolant without flushing out the old. However, with time, the older coolant becomes acidic. This can cause corrosion, and afterward, can cause defects in the cooling system.

How long can you run a car without coolant?

However, if you absolutely must start your car without coolant, it can probably run for about a minute without too much risk of damage. You may be able to get away with as much as 5 minutes of running without coolant, depending on the engine, car model, and how hard you’re asking the engine to work.

How much coolant loss is normal?

It’s very normal to drop around 0.25 percent of coolant every 4-6 months. In a year around if you lose about 2-3 ounces, you don’t need to panic at all. However, you should keep refilling the coolant container with ample liquid regularly.

Why is my car losing coolant but not overheating?

Chances are you have either a radiator cap leak, internal coolant leak or an external coolant leak. The longer you wait the higher the coolant leak repair cost will be.

Can overfilling coolant cause damage?

Coolant expands as it heats and contracts when it cools. The extra space prevents damage to your engine and hoses. In worst case scenarios, overfilling your antifreeze tank can lead to electrical damage if overflow comes into contact with engine wiring.