Environmental Protection Agency
In 2001, EPA finalized a new, major program for highway heavy- duty engines. That program, the Clean Diesel Trucks and Buses program, will result in the introduction of advanced emissions control systems such as catalyzed diesel particulate filters (DPF) and catalysts capable of reducing harmful nitrogen oxide (NO<INF>X</INF>) emissions. This final rule will require that these advanced emissions control systems 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. This final rule will require manufacturers to install OBD systems that monitor the functioning of emission control components and alert the vehicle operator to any detected need for emission related repair. This final rule will also require that manufacturers 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. Lastly, this final rule revises certain existing OBD requirements for diesel engines used in heavy-duty vehicles under 14,000 pounds.
Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency 40 CFR Part 86, 89, 90, 1027, 1033, 1042, 1048, 1054, 1060, 1065, and 1068 [EPA-HQ-OAR-2005-0047; FRL-8750-3] RIN 2060-AL92 AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: In 2001, EPA finalized a new, major program for highway heavy-duty engines. That program, the Clean Diesel Trucks and Buses program, will result in the introduction of advanced emissions control systems such as catalyzed diesel particulate filters (DPF) and catalysts capable of reducing harmful nitrogen oxide (NO X ) emissions. This final rule will require that these advanced emissions control systems 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. This final rule will require manufacturers to install OBD systems that monitor the functioning of emission control components and alert the vehicle operator to any detected need for emission related repair. This final rule will also require that manufacturers 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. Lastly, this final rule revises certain existing OBD requirements for diesel engines used in heavy-duty vehicles under 14,000 pounds. DATES: This rule is effective on April 27, 2009. The incorporation by reference of certain publications listed in this regulation is app…
Citation: 74 FR 8310
