I wouldn't scan it with Peake. You need DIS to scan the EHC module. The could would be an accumulator filling requested code, EHC74. If the bags are holding air and level that is a very likely culprit.

Bagpipingandy's kit on eBay is a great one for $50. But either way if you repair the compressor you still need to reset the faults in the module for the dash error to go away. Good luck hope I helped

__________________
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