They are both required to be accessed through a standardized data link connector defined by SAE J1962. In 1996, light duty vehicles (less than 8,500 lb or 3,900 kg) were the first to be mandated followed by medium duty vehicles (8,500–14,000 lb or 3,900–6,400 kg) in 2005. Though not mandated, many motorcycles also support OBD-II PIDs. Manufacturers also define additional PIDs specific to their vehicles. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections. SAE standard J1979 defines many OBD-II PIDs. OBD-II PIDs ( On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. ( Learn how and when to remove this template message)
Please help rewrite this article and remove advice or instruction. This article is written like a manual or guide.
