A state Environmental Protection Agency (EPA) official, speaking off the record with WEVTU, says the U.S. EPA has run into a number of snags that could greatly delay the use of OBD-II (onboard diagnostics) to pass or fail vehicles for emissions compliance in state I/M programs, rather than the typical method of measuring exhaust pollutants from either dynamometer or idle testing. Three problem areas are mentioned: First, not all vehicles have the required SAE J1962 outlet plug in the same ...
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