OBD II Diagnostic Trouble Code (DTC) Definitions You can now get the definitions of Global OBD II (P0) and Enhanced OBD II (P1) Diagnostic Trouble Codes (DTCs) online. Simply use the menus below to select your vehicle and request the definition of your OBD II DTC. What Make is the Vehicle? Make [Select Make] Acura Audi BMW Buick Cadillac Chevy Chrysler Daewoo Dodge Ford GM Truck Honda Hyundai Infiniti Isuzu Jaguar Jeep Kia LandRover Lexus Lincoln Mazda MercedesBenz Mercury Mitubishi Nissan Oldsmobile Pontiac Porshe Saab Saturn Subaru Suzuki Toyota Volkswagen Volvo   * For Chevy truck choose GM Truck.