Why does my low coolant light came on when its full?

What causes the coolant warning light to come on? 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. You may need to book a coolant change.

Why does my BMW coolant light keep coming on?

When the cooling system reaches a low pressure, the car might perceive this as low coolant. In this case, the sensor will likely need to be replaced. Coolant leaks can occur due to a number of reasons, including a broken radiator seal or a compromised radiator.

How do I get the low coolant light to go off?

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.

Is it normal for BMW to lose coolant?

Coolant loss is normal. Typically a BMW cooling system has a fill capacity of 6.5 litres. It is expected that in a 6 month period – coolant loss is about 15%. This is because the expansion tank has a cap that reliefs pressure at 1.4 bar.

Is it safe to drive with coolant light 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.

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. It could also be a hydraulic lock.

How does BMW coolant level sensor work?

The coolant level sensor works with a float that contains a ring magnet. The ring magnet closes the reed switch inside when there is enough coolant in the radiator. Once the coolant drops to a certain level, the float follows the level, the reed switch is removed from the magnet, and contracts the reed switch open.

Why does my car keep asking for coolant?

Disappearing engine coolant could be the result of a slightly cracked hose, a tiny hole in your radiator, or a water pump issue. It’s also possible for a coolant leak to develop inside your vehicle or to simply vaporize into mist via your defroster.