I haven't heard of many oil pump failures on M54's unless you have a ton of sludge in the bottom of the pan, have you done recent oil changes and all looked good on drainage? If so I wouldn't believe you have a failing oil pump but I've been wrong before.

My first suggestion is get the faults scanned with DIS then we will know whether its just an electrical fault at the switch or not.

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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