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As a mechanic and a Range Rover owner who has experienced numerous reliability issues over the years, particularly with the air suspension system, I know first-hand the frustration of dealing with a Range Rover air suspension that won’t lower.
So, if you’re here because you’re dealing with this issue, I feel you.
In this article, I’ll walk you through the signs and symptoms of a Range Rover air suspension that won’t lower, list the possible OBD codes related to it, common causes, the parts you’ll need to replace, and the tools you’ll need.
Plus, I’ll provide a step-by-step guide on how to fix the issue yourself. Let’s get started!
What models are affected?
- Land Rover Defender
- Range Rover Discovery
- Range Rover Evoque
- Range Rover Sport
- Range Rover Velar
- Range Rover Vogue
Signs and symptoms
There are a few signs and symptoms that you might notice if your Range Rover air suspension won’t lower. These include:
- The vehicle is sitting higher than usual
- The suspension feels stiffer than usual
- The ride height won’t adjust regardless of the mode selected on the dashboard
List of possible OBD codes
If you use an OBD tool, you may receive one or more of the following codes:
- C1A20- Pressure increases too slowly when filling the reservoir
- C1A137- Pressure does not decrease when venting the gallery
- C1A69- Pressure does not decrease when venting the supply
- C1A24- Slow leak detected (the system does not leak down quickly enough)
- C1A13- Pressure does not decrease when venting the reservoir
Buying guide: Best Land Rover OBD2 scanner tools
A Range Rover air suspension that won’t lower can be caused by a number of issues, including:
- Failed air compressor: The air compressor is responsible for pumping compressed air into the system, and if it fails, the system won’t be able to lower.
- Leaking air springs: The air springs are responsible for holding up the vehicle and maintaining the desired height, and if they’re leaking, the system won’t be able to lower them.
- Faulty valve block: The valve block directs the compressed air to the correct air spring, and if it’s faulty, the system won’t be able to lower it.
- Broken or corroded air lines: The air lines that connect the compressor, valve block, and air springs can become corroded or break, and in either case, the system won’t be able to lower.
- Faulty height sensors: The height sensors communicate the vehicle’s height to the control module that manages the air suspension system. If they’re not working correctly, the system may not lower.
Can it be fixed without a mechanic?
It’s possible to fix the issue yourself if you have some mechanical knowledge and the right tools.
However, if you’re not confident in your ability, it’s best to take the vehicle to a qualified mechanic to have it diagnosed and repaired professionally.
Parts you’ll need to fix it
To fix a Range Rover air suspension that won’t lower, you’ll need the following parts:
- Air compressor
- Air springs
- Valve block
- Air lines
- Height sensors
Tools you’ll need to fix it
To fix a Range Rover air suspension that won’t lower, you’ll need the following tools:
- OBD scanner
- Jack stands
- Wheel chocks
How to fix it
Here’s a step-by-step guide on how to fix a Range Rover air suspension that won’t lower:
- Use an OBD scanner to read the fault codes.
- Inspect the air compressor and replace it if it’s faulty.
- Inspect the air springs for leaks and replace them if necessary.
- Check the valve block for cracks and replace it if it’s damaged.
- Check the air lines for breaks or corrosion and replace them if needed.
- Inspect the height sensors and replace them if they’re not working correctly.
- Once you’ve replaced the faulty parts, use the OBD scanner to clear the fault codes and reset the suspension control module.
Potential alternative causes
In rare cases, a Range Rover air suspension that won’t lower may be caused by electronic issues or control module faults.
If you’ve replaced all the above components and still have the issue, it’s best to take the vehicle to a qualified mechanic to have it diagnosed further.
How much does it cost to fix a Range Rover air suspension that won’t lower?
The total cost of fixing a Range Rover air suspension that won’t lower depends on the root cause of the issue and the cost of the replacement parts. However, the total cost can range from a few hundred dollars to over a thousand dollars in extreme cases.
Why won’t my Range Rover air suspension lower?
A Range Rover air suspension may not lower due to various reasons, including a failed compressor, leaking air springs, a faulty valve block, broken air lines, or faulty height sensors.
Can I still drive my Range Rover if the air suspension won’t lower?
If your Range Rover air suspension won’t lower, you can still drive it, but the stiff suspension may result in a rough ride.
Last updated and verified on 6th September 2023