Modern cars have become surprisingly chatty. Between dashboard lights, infotainment messages, emails, and manufacturer apps, your vehicle can now tell you about maintenance in several different places. So when your phone warns you first, it is reasonable to wonder which screen deserves your attention. In many cases, the app is receiving legitimate information from the vehicle itself—but that does not make the dashboard obsolete. Here is how to handle the situation without ignoring something important or booking an unnecessary repair.