Folks,

New here, sorry if this is a repeat...I searched before posting. 2017 L405 SC. I get the red Suspension Fault warning periodically. Car drives fine. When I check for codes I get none. I thought it might even be my code reader so I bought another JLR-specific reader and it says no codes and no ECO faults. Suspension does not seem to lower overnight and goes up and down when I click the ride height switch with no issues.

Anyone have any ideas on what simple things I could do or check? Thanks in advance!

 

Have you checked your battery lately? If the battery is weak, it does all kinds of strange stuff.

 

Thanks for the response....much appreciated. Yes, a new battery was installed by the dealer about one year ago. I had the same thought about the battery being a little down, but it is quite new. Any other things I can check easily?

 

You are saying that the car suspension does not lower overnight. Have you tried to park it and not drive it for two or three days? Try that and see if any corner is lower than the other after it is parked for a longer time period. Tiny leaks in an air suspension may not become obvious overnight. Also, make sure you park it on a level ground.

 

Well, I parked it in a level garage for two days. I removed the air suspension fuse so all corners would not lower to compensate for one. I measured the height of each wheel from the ground to the fender arch. I re-measured after one day and again after two days....no lowering. I drove the car this morning for ten minutes with no suspension warnings. I stopped to grab a coffee, and the suspension warning showed up when I re-started the car.
Any more things I can try? THANKS.

 

What year is your Range Rover?
On older model Range Rovers, you could turn the ignition key on 3 times in a row without starting the engine and that would reset the system. It really is hard to pinpoint the issue with no codes showing. Another thing to do would be to check all the grounds. Have you taken it to a dealer yet? I am curious to know what you find out.

 

It's a 2017. I have not begun looking at grounds, but I think they are behind the wheel well liners in the front, correct? I am trying to avoid going to the dealer. This is just the kind of issue that could rack-up the diagnosis time and cost. Thanks again......

 

Check these two threads: https://www.rangerovers.net/threads/l405-ground-or-bcu-issue.359616/

​​​​​​https://www.youtube.com/watch?v=vExiC77RvPs