Abstract: Systems and methods are provided for vehicle diagnostic aware route planning and navigation. A route management system receives diagnostic data from vehicle diagnostic harnesses and analyzes it along with historical vehicle data to determine vehicle parameters and potential routing conflicts. The system detects vehicle conditions through diagnostic codes or sensor data and determines appropriate route modifications based on factors including vehicle location, service requirements, and delivery schedules. Vehicle attributes are determined through analysis of both VIN data and diagnostic signals to create comprehensive vehicle profiles for routing purposes. When conflicts are detected, the system can modify routes to include service locations or identify replacement vehicles based on compatible configurations.