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Onboard Diagnostics * USA - California Gets Okay to Require they
CAL,USA -Bus & Motorcoach NEWS (subscription) -1 Oct 2008: -- A decision by the U.S. Environmental Protection Agency (EPA) to give the state of California a waiver allows state environmental regulators to impose new onboard diagnostic rules for diesel engines in 2010 and beyond... Other states are likely to follow California's lead and mandate that engine manufacturers install more sophisticated onboard diagnostic devices with more rigorous failure thresholds. The primary components of onboard diagnostic systems include software designed into a vehicle's computer to spot emission control system malfunctions as they take place. Such systems must monitor for engine misfires and emissions associated with various systems, including fuel, catalyst, turbo-charger, particulate matter filter, exhaust gas recirculation, variable timing and control, and cooling, according to California Air Resources Board regulations. In early 2007, EPA announced that it would propose its own onboard diagnostic system requirements for heavy diesel, but the agency has yet to finalize the rule...
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