What are OBD-II Trouble Codes? OBD-II (On-Board Diagnostics) trouble codes are diagnostic codes that are generated by your vehicle’s onboard computer system. These codes help identify specific issues or malfunctions within the vehicle’s various systems, such as the engine, transmission, or emissions. What is the Subaru OBD-II Trouble Code P0935? The Subaru OBD-II trouble code…