OBD II
Definition:
Onboard Diagnostics II-A second-generation emissions diagnostic system required on all 1996 and newer vehicles (though some 1994 and 1995 model year vehicles were equipped with early versions of the system). The OBD II system monitors vehicle emissions, and illuminates the Check Engine or Malfunction Indicator Lamp (MIL) if it detects a problem that causes emissions to exceed the federal limits by 50% or more. The OBD II system also stores diagnostic trouble codes to help technicians diagnose the cause of the emissions problem. OBD II cars and light trucks also have a standard diagnostic connector.
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