I would also take Brandon002's advice and use OBC test 7 for voltage while running, just to rule out a bad alternator.

However if the odometer works and cruise works, you're almost certain its one of the sensors. You could always buy one and guess on which side it is, if it doesnt work on the first side then put the new sensor in the other side and swap the other one over, should be working by then LOL!

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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