Range Rover Coolant Level Low

A coolant is a fluid that controls your car’s temperature. The low coolant level in the vehicle spells trouble since it can cause overheating. A leaking coolant system is the most frequent cause of a low coolant level. Faulty hoses, sensors, or gaskets may cause leaks.

Range Rover Coolant Level Low


One of the most frequent issues with Range Rover vehicles is the “Coolant Level Low” alert. The issue has been reported on Range Rover Sport and Evoque models. When the coolant level drops below a predetermined level, a signal is sent to the car’s Electronic Control Unit (ECU) by a coolant level sensor.

The sensor is located in your vehicle’s coolant reservoir (expansion tank). A faulty sensor, rather than a low coolant level, is often the cause for this alert.

A coolant temperature sensor is crucial for optimum engine operation. It monitors the control module’s coolant temperature. A common coolant level sensor for Range Rover is the PCJ500030, known as Coolant Bottle Low-Level Sensor.

It fits with most of the Range Rover models and resolves the problem of a false “Coolant Level Low” indicator light. Additionally, it resolves the failure to warn the driver of dangerously low coolant levels.

Causes of the Low Coolant Level Indicator


  1. Faulty coolant level sensor

A malfunctioning coolant level sensor is the main reason why your Range Rover displays a coolant level low fault notice. The sensor keeps track of the amount of coolant in the system and notifies the ECU when it is low.

If this sensor malfunctions, it will give the ECU the incorrect signal, leading it to believe that your engine doesn’t have enough coolant when there is plenty.

Range Rovers, unfortunately, are particularly prone to this problem. The sensor in this vehicle is known to malfunction sooner than you would anticipate. This could be the issue if your Range Rover displays a low coolant level notification even though the coolant is at the recommended level.

A simple sensor replacement will resolve the low coolant level warning. But, it is advisable to replace the entire reservoir since a new one is reasonably inexpensive and comes with a new sensor.

  1. Leaking coolant reservoir

A leaking coolant reservoir is another common cause. This frequently occurs if you overfill your Range Rover with coolant and start your vehicle without realizing that some extra coolant has leaked out.

Checking the coolant level in the bottle and then looking for leaks under the car are the simplest ways to identify this problem.

  1. Low Coolant Level

Open the hood and follow the simple instructions to check the coolant level. Then, fill it up, if necessary, with the appropriate amount of coolant (above the minimum but below the maximum mark).

Unfortunately, some Ranger Rover owners overlook this step when figuring out what’s wrong with their vehicle. It could be the case that the coolant level is actually low, and the sensor is working as it should.

Signs of a faulty coolant level system

The following signs indicate a malfunctioning coolant system:

  1. Overheated engine: There is a good chance that your coolant system is malfunctioning if your engine is overheating. There are several causes for engine overheating. However, the system will fail if the coolant level sensor is the primary culprit. [1]
  2. Coolant light staying on: One of the initial signs that something is wrong is when the coolant level sensor light continues to illuminate. The sensor light will remain on when the sensor shorts. This is problematic since a coolant light always on won’t alert you to a problem as it develops. As soon as it manifests, this needs to be checked.
  3. Low mileage: An inaccurate air-fuel mixture can result from a malfunctioning coolant sensor because it sends erroneous data to your car’s computer system. The final effect is a decrease in engine performance and fuel efficiency.
  4. Exhaust pipe releasing black smoke: The ECU may increase the air-fuel mixture when the engine temperature is unstable, which results in incomplete combustion. Incomplete combustion will produce dense, black smoke.


Fixing Low Coolant Level on a Range Rover

Check the coolant level first. If it is below the minimum line, top it with the appropriate coolant for your Range Rover (the manufacturer recommends OAT Coolant).

Since this problem could be caused by a faulty sensor or a fractured coolant bottle, replacing the entire coolant reservoir is recommended. [2]

When checking the coolant level, you don’t need to open the radiator cap.

The word “full” will be written on the side of each reservoir to help you determine the appropriate level. You don’t need to add more coolant if the coolant level is at the reservoir’s “full” line.

Based on the model and make of your car, you may need to remove the radiator cap and add more coolant if it is below the “full” line to achieve a 50/50 mix of coolant and water.

But, again, your owner’s manual will tell you what kind of coolant you require.

Knowing what to look for when shopping for a coolant is crucial since the coolant is thinner than oil. You should schedule service once you notice a sludgy appearance in the coolant.

An internal gas leak causing the coolant to drain quickly and overheat the engine could cause sluggish coolant.

The coolant level naturally declines over time. Therefore, every three to six months, it’s a good idea to check the coolant level to determine if it’s time to replace the coolant.

You need to know more about the coolant if you are doing the replacement yourself. The coolant is typically blue, green, yellow, or red. If you discover that your coolant has a different color, flush it out and replace it with fresh coolant.

Read Also: Should I Warm Up My Car in Summer


The “Coolant Level Low” alert should never be disregarded. It should warrant a fast exit from the highway to investigate it, even when you suspect it’s a false alarm. To keep your engine operating properly, perform routine maintenance on your cooling system.

Contact your car dealer or professionals to help you with any coolant needs or repairs your car might need. Additionally, take time to understand your Range Rover’s coolant system. This will help you to keep track of the coolant.

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