Methods and systems for vehicle diagnostic detection and communication are disclosed. Specifically, a method to monitor the health of vehicle systems and subsystems and diagnose detected anomalies is provided. In the event an anomaly or unhealthy state is detected within a vehicle, subsystem or component, the system may take a number of actions. In one embodiment, the actions comprise notifying a maintenance provider, a regulatory monitor, and original equipment manufacturer. The system may also maintain a vehicle fleet-wide performance database to enable identification and analysis of systemic fleet-wide data.