The OP posted this at 5am on a Sunday, in guessing whatever happened at the dealer is said and done? Why tell half the story? What turned out to be the malfunctioning component? It would literally take 5 minutes to diagnose by putting the spare on at whichever location wasn't reading. 12 hours later we are still talking about it and being the dealer is closed today, most of us would have figured it out ourselves by now. Especially if there is a concern about it potentially not being covered by warranty. How he took it to the tire shop and they didn't bother to even try and diagnose it any more than putting a gauge on the tire and saying "it's all good" makes me question that shop.