Course number: SV22406

Beginning in 1996, the federal government required all light trucks and cars sold in the U.S. to be equipped with a diagnostic system known as OBD-II (on board diagnostics 2). The purpose of this system is to identify when the emissions coming from the exhaust exceed the federal standard and to alert the driver when this happens. To do this, the OBD-II system monitors the engine for misfires, detects when misfires occur, and stores critical vehicle data when a misfire is detected.