What is OBD-II?
OBD is short for “On-Board-Diagnostic” and simply refers to those systems that are controlled or incorporated into the new automobile computers to monitor or control systems that affect the vehicle emissions. The Clean Air Act of 1970 established the Environmental Protection Agency (EPA) and several graduated emission standards were established over time. Vehicle manufacturers eventually turned to electronics to control the fuel and ignition systems to meet the standards. While each manufacturer had their own systems and signals early on, the EPA eventually set standards and practices for implementation by all manufacturers. All cars built since January 1, 1996 have what is identified as OBD-II. Usually a problem with the emissions system will alert the driver via “CHECK ENGINE” light on the instrument panel. Should this light appear, you should see your repair technician right away. Lengthy delay in seeking repairs could cause major damage to your engine or its components.
On-Board Diagnostic systems are in most cars and light trucks on the road today. During the ’70s and early 1980’s manufacturers started using electronic means to control engine functions and diagnose engine problems. This was primarily to meet EPA emission standards. Through the years on-board diagnostic systems have become more sophisticated. OBD-II, a new standard introduced in the mid-’90s, provides almost complete engine control and also monitors parts of the chassis, body and accessory devices, as well as the diagnostic control network of the car.
