Abstract: Systems and methods discussed herein are directed to combining non-onboard diagnostic (OBD) codes with OBD codes to provide a list of codes that may be used to provide information to a user regarding a vehicle. For example, an auxiliary monitoring device may be included in a vehicle in the form of one or more sensors, e.g., cameras, image sensors, movement sensors, audio sensors, variable reluctance (VR) sensors, infrared (IR) sensors, odor sensors, etc., that may collect vehicle information that is not available through the vehicle's OBD port. The auxiliary monitoring device may obtain the information and convert the information into a corresponding non-OBD code. The auxiliary monitoring device thus complements an OBD monitoring device included in the vehicle that is coupled to the vehicle's OBD port to obtain OBD codes therefrom.