Welcome to the forum!!! My YJ came with an air gauge in the glove box works great. Sounds like a dealer problem and I am sure that light is annoying.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184