Depending on what your intended use is going to be. Skid plates are a must, factory and an additional transmission skid. Also if you plan on getting into any rocks a good steering upgrade is needed. Locally steering components are the biggest failure on the trails.
Had the exact problem yesterday. I was on the tail end of 2500mile road trip. For a few hours the dash was in a foreign language. Cleared up after a while.
I can tell you he is getting full use out of his Bronco. Not beating it up, just tackling some of the best granite rock trails the Sierra Nevadas have to offer.