Final Rule for Control of Air Pollution From New Motor Vehicles and New Motor Vehicle Engines; Regulations Requiring Onboard Diagnostic Systems on 2010 and Later Heavy-Duty Engines Used in Highway Applications Over 14,000 Pounds
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Rule Summary
The U.S. Environmental Protection Agency (EPA) is promulgating regulations that will require the emission control systems of large highway diesel and gasoline trucks to be monitored for malfunctions via an onboard diagnostic system (OBD) similar to those systems that have been required on passenger cars since the mid-1990s. In addition to these requirements, EPA is requiring manufacturers to make available to the service and repair industry information necessary to perform repair and maintenance service on OBD systems and other emission-related engine components. This rule also makes changes to certain existing OBD requirements for smaller highway heavy-duty diesel trucks.
- Final Rule (pdf) (790 KB, published February 24, 2009)
- Summary and Analysis of Comments (pdf) (1.16 MB, EPA-420-R-08-018, December 2008)
- Final Technical Support Document (pdf) (696 KB, EPA-420-R-08-019, December 2008)
Rule History
Additional Resources
- Fact Sheet: EPA Finalizes Regulations Requiring Onboard Diagnostic Systems on 2010 and Later Heavy-Duty Engines Used in Highway Applications Over 14,000 Pounds; Revisions to Onboard Diagnostic Requirements for Diesel Highway Heavy-duty Applications Under 14,000 Pounds (pdf) (381 KB, EPA-420-F-08-032, December 2008)