The reservoirs are marked "150 psi" max, etc. Factory pressure bleeds on the line at something like 100 psi. Rears area bugger to get fluid through at lower pressures. I can generally get them bled well at 25-30 psi with a home shop Motive pressure bleeder. As a precaution after a master cylinder swap I had the local dealer bleed them with the Starscan routine, no air in the system, no change at all in pedal feel.
Curious what scan tool you are using?
'09 JKRU. 4" Teraflex long arm, Teraflex R44 housing, Teraflex / Fox Resis, Poly Performance skids, Nemesis Billy Rockers, Nemesis flares, 37" ATZ P3s on 17" 5x5.5" Trailready HDs, Spyntec hubs, Teraflex BBK, Mopar BBK master/booster, Superior front & Alloy USA rear axle shafts, CTMs, Reids, Synergy drag link & tie rod, WTOR hydro-boosted steering, 5.38s, TF Dual Rate front bar, TF bumpers, Warn Powerplant, Tom Woods shafts, AA xfer case cable, Kilby canister relo, RH4x4 cage.