Same thing happened to my 13, May be the same with yours. I had a key fob for accessing my shop security door next to my ignition key for probably 6 months. Somehow it affected the chip in the key. They replaced the ignition and key under warranty. Have you tried your other key?
Has anyone installed the Rancho quick lift shocks? Looks to be a decent alternative. I don't want to loose any ride quality with a spacer levelling kit after bouncing down the road in 3/4 tons.