Your rear ride height looks fine, you sure your left front bag isn't leaking?

If it leaks down enough I could see it tripping an error. If you tell me that the error is cleared and the X goes back to normal heights, but after parking it for a while that corner comes down, the bag is leaking.

Have you done a ride height recalibration as well? Maybe that's all you need.

As for the engine, I don't know the N62 well at all, so I'm out of advice.

GL.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards