The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 Range Rover Sport Air Suspension Fault - Compressor or Sensor?

0

Mike T. · rep 0 · May 25, 4:44 AM · 1 replies · solved · Question

Vehicle: 2017 Land Rover Range Rover Sport SE

Hello fellow Land Rover owners,

I've been getting the dreaded "Suspension Fault" message on my 2017 Range Rover Sport SE. The vehicle sometimes sags on one side, or the entire rear end drops overnight. I also notice the air compressor running much more frequently than it used to, and sometimes it sounds really strained, or doesn't seem to run at all when I try to raise the vehicle.

I'm trying to figure out if this is a problem with the air suspension compressor itself, a leaky air spring, or perhaps a faulty height sensor. I've heard these can be common issues. Has anyone dealt with this particular fault on their Range Rover Sport?

What are the typical diagnostic steps or things I can check before taking it to the shop? I'm hoping to get some insight on potential causes.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:44 AM

0

ClearTheCode admin answer:

The "Suspension Fault" message on a 2017 Range Rover Sport is a common indicator of an issue within the electronic air suspension (EAS) system. Given your symptoms – sagging, frequent compressor operation, and a strained compressor – several electrical and mechanical components could be at fault.

Here's a breakdown of common causes and diagnostic steps:

  1. Air Leak in the System:
    • Air Springs (Bags): This is a very common failure point. Over time, the rubber air springs can crack or develop pinhole leaks, especially where they crease. This leads to the vehicle sagging, often overnight or when parked for extended periods. You might hear a hiss or use a spray bottle with soapy water to check for bubbles around the air springs.
    • Air Lines/Valves: Leaks can also occur in the plastic air lines, at the valve block (which directs air to each spring), or at the compressor's pressure relief valve.
  2. Air Suspension Compressor Issues:
    • Worn Compressor: If the compressor is running constantly or sounds strained, it might be worn out. Its internal piston ring can degrade, reducing its ability to generate sufficient pressure. This can lead to slow raising times or the system faulting out.
    • Compressor Relay/Wiring: A faulty relay or wiring to the compressor can prevent it from receiving power or operating correctly. Check the relay in the fuse box.
  3. Height Sensor Malfunction:
    • Your Range Rover Sport has height sensors at each wheel that tell the Air Suspension Control Module (ASCM) the vehicle's current height. If a sensor fails (e.g., due to corrosion, damage, or internal fault), it can send incorrect readings, causing the system to try to over-inflate or deflate a corner, or trigger a fault.
    • Common OBD-II C-codes related to height sensors include C1A00 (Control Module), C1A07 (Sensor General Electrical Failure), or codes specific to individual sensor circuits.

When to See a Shop: While you can visually inspect for leaks, diagnosing compressor health, valve block issues, or height sensor faults often requires specialized diagnostic equipment (like a Land Rover-specific scan tool) to read live data and perform component tests. If the issue isn't a clear air spring leak, or if you're getting specific C-codes, it's highly recommended to take your Range Rover Sport to a Land Rover dealership or an independent specialist. They can accurately pinpoint the electrical or mechanical fault and ensure proper repair and calibration of the EAS system.

Menu

Help & account