What is the difference between an OBD-I Catalytic Converter and an OBD-II Catalytic Converter?
OBD stands for On Board Diagnostic. There are 2 versions. OBD-I and OBD-II. In 1970 Congress passed the Clean Air Act and established the Environmental 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 turned to electronically controlled fuel feed and ignition systems. Sensors measured engine performance and adjusted the systems to provide minimum pollution. These sensors were also accessed to provide early diagnostic assistance. At first there were few standards and each manufacturer had their own systems and signals. In 1988, the Society of Automotive Engineers (SAE) set a standard connector plug and set of diagnostic test signals. The EPA adapted most of their standards from the SAE on-board diagnostic programs and recommendations. This is considered OBD-I. OBD-II is an expanded set of standards and practices developed by SAE and adopted by t
