I wish i could help, not real sure but id say your on the right track, sensors or a leak in the shock, or maybe the compressor is going bad, gotta be one of those general parts.OK, so random suspension problem here lately. It's been lowered nearly 4.5 years. Just about completely level when aired up in the back.
The last few weeks I've noticed that the rear is almost an inch to 1.5 higher when the comp shuts off. Sometimes it'll stay like that after parking, sometimes it'll deflate. There' s no certain times or instances that it does it. Very random.
Could the ride height sensors be failing?
Air shocks going bad??