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As you read about OBD II catalytic converters below, it is very important that you replace the converter on your vehicle with one that is OBD II. If You replace your converter with one that is NOT OBD II you will experience multiple problems AND experience that awful CHECK ENGINE light. Many converter sellers on the internet DO NOT SELL OBD II compliant catalytic converters. ADC Catalytic Converters sells ONLY OBD II copliant converters in catalogued use vehicles.

What IS OBD II

Where did it come from?

To combat its smog problem in the Los Angeles basin, California started requiring emission control systems on 1966 model automobiles. The federal government expanded those controls nationally in 1968.

In 1970, congress passed the clean air act and established the Enviromental Protection Agency (EPA). This started a series of graduated emission standards and requirements for maintenance of vehicles for extended periods of time. To meet these standards, manufacturers went to electronically controlled fuel feed and ignition systems. Sensors measured engine performance and adjusted the systems to provide minimum pollution. These sensors were also accesed to provide early diagnostic assistance.

At first there were few standards and most manufacturers had their own systems and signls. In 1988 the Society of automotive Engineers (SAE) set a standard connector plug and set of diagnostic test sygnals. The EPA adapted most of their standards from the SAE on board diagnostic programs and recommendations. OBD II is an expanded set of standards and practices developed by SAE and adopted by the EPA and CARB (Califonia Air Resources Board) for implementation on January 1, 1996.

Does my car or truck have OBD II?

ALL cars and light trucks built since January 1, 1996 have the OBD II systems. Manufacturers started incorporating OBD II in varios models as early as 1994, but some early OBD II vehicals were not 100% compliant.