If your INFINITI suddenly flashes a "No Key Detected" warning, it can be frustrating—especially when you're ready to hit the road. This message means your vehicle isn’t recognizing the key fob, preventing the engine from starting. But don’t worry! Whether you're driving a QX80, QX50, QX60, or QX55, this issue is often caused by something simple, like a weak key fob battery or interference from other devices.