air suspension problems

[iceman_137]

high guys. having problem air ride on my 03, it all started when my dump valve would not hold then the suspention droped very low, at first the rear inflator worked but after some trouble shooting it quit too.instead of taking it too the dealer opted too by a new compressor unit from arnot supention at a good price. when i instaled it the supention still would not raise therefore took it too dealer to scan dtc . they fond air ride sensors drain volt at recomended volts but could not clear dtc too doo a ride height cal. their saying too replace both ride sensors even tho they ohm out ok and have proper reading these are about 800.00 canadian would hate too change for nothing any ideas on how too test whith out thech 2 please help any inout is appreciated