Here's where I documented servicing the valve blocks, I believe others have used the O-rings that I used and have had success:
https://www.landroverworld.org/threads/2012-lr4-reluctant-to-lower-from-off-road-suspension-mode.44636/page-3
That's seems super expensive; I watched a few videos to see how to do the swap and it looked pretty easy; I'm having trouble to quickly find OEM spring/shock prices but even at $600 or $700 per corner that would still be less in parts than they're quoting for either end... Anyway, why replace...
I believe you can also look at the air springs as they have the original date on them, I believe this is quite well documented on this and other forums. Mine is a 2012 as well (98K miles) and is still on the original springs; I have no intention of replacing them until they fail but I also...
So I can now classify myself as OCD :), here's a thread I started:
https://www.landroverworld.org/threads/interior-sill-plate-protection.44915/
So you just used the grips to bend the Discovery 5 plates, any downsides yet?
I suggest figuring out what type of compressor you have (in my post I have an AMK and show pictures of it - this can help you identify what you have); then in the GAP tool you can identify what firmware you have. If there's a mismatch between the two (AMK physical compressor and say Hitachi...
I literally went through all my valves, everything, trying to chase this issue... I flashed the firmware once the GAP tool arrived and it was like a switch; the code went away and so far didn't come back (it's been 16 months)... I hope you have the same issue and resolution but defer to those...
I had a lot of fun with this very same code and also noticed issues an an incline... Here's the thread:
https://www.landroverworld.org/threads/2012-lr4-reluctant-to-lower-from-off-road-suspension-mode.44636/
To cut a long story short, the compressor was incorrectly specified in the RLM ECU...
Price looks pretty darn good as well (just over $4K), I know that $5K is the number usually quoted; I also see they mark it as 19hours, my local Indy said 18hours; so good ballpark figure there as well...
"How long was the interval between the photo ending in 14 and the one ending in 16? If you use the "hood open/cancel twice" trick soon after stopping the engine, you can actually watch the oil level indicator rise."
Great question, I think what you really need to consider is how long after...
Could it be some sort of electrical gremlin whereby re-seating, moving, etc. has caused the fault to disappear? At a stretch I could imagine moving the coil and plug could reestablish a better ground? It's weird!
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