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Discussion Starter #1
I have repaired a 2016 LR4 HSE after a minor wreck that needed the front right lower control arm and steering rack replacing, The car starts and runs OK, but the air suspension is behaving badly, It sits with the front at low height and the rear at normal height.

When I start the car, it asks me to select a ride height. I select Normal, and it goes into extended mode. When I drive, it drops down to normal. After a few mins, it then errors and tells me not to exceed 30mph - Service Required and bounces around badly. There are no error codes for ride height, the ride height sensors seems to be in good condition and calibrated.

I also get occasional HDC and Braking Assistance / stability errors. I thought this could be a bad wheel speed sensor, but there are no codes for that.

My local LR specialist took a look at it and said they had no idea what was wrong, but this may be because they just charged me $200 to scan it for codes and found nothing other than codes for lost communication with Transfer Case module, which apparently I don't have in the car anyway.

Does anyone have any pointers for me to check out? I am thinking the secondary battery is getting to end of life, but would this cause all those issues?
 

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very disco
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I would check your plumbing at the front valve block.
 

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Discussion Starter #3
Good call. thank you. I discovered a small air leak in the front right strut. I bought a used one from ebay and now the LR4 behaves correctly. Amazing how a small leak can cause so many issues in suspension ride height, DSC, HDC etc.
 
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