Heavy-duty on-board diagnostics (HD OBD) regulations are crucial for ensuring emissions compliance and maintaining clean air. The California Air Resources Board (CARB) regularly updates these regulations to address evolving technology and environmental concerns. This guide provides an overview of recent updates and resources for staying informed about HD OBD requirements.
CARB’s HD OBD Regulatory Updates
CARB has implemented several significant updates to HD OBD regulations in recent years. These updates address various aspects, including specific engine types and compliance requirements.
2023 HD Omnibus Regulation
The 2023 Heavy-Duty Engine and Vehicle Omnibus Regulation, with a Board hearing date of October 20, 2023, includes amendments to HD OBD rules. These changes address the application of OBD requirements for “legacy” heavy-duty diesel engines and engines with a maximum power rating of 525 bhp or greater. Detailed regulatory documents are available on the official CARB website for the 2023 HD Omnibus rulemaking.
2021 OBD II and HD OBD Amendments
In 2021, CARB adopted amendments to OBD II and HD OBD regulations (sections 1968.2, 1968.5, 1971.1, and 1971.5 of title 13, CCR). These amendments impact various aspects of OBD compliance. Relevant documents are accessible on the CARB OBD II Regulations and Rulemaking website and the official CARB regulatory website for the 2021 OBD rulemaking.
2020 HD Omnibus Regulation
The 2020 Heavy-Duty Engine and Vehicle Omnibus Regulation, with a Board hearing on August 27, 2020, significantly revised exhaust emission standards, test procedures, and other emission-related requirements for 2024 and later model year California-certified HD engines. This includes updates to the HD OBD regulation. The regulatory documents can be found on the official CARB website for the 2020 HD Omnibus rulemaking.
2018 HD OBD and OBD II Updates
The 2018 HD OBD and OBD II rulemaking, finalized in 2019, included significant changes. CARB provides comprehensive documentation related to this update, including the Final Statement of Reasons, documents for the 15-Day Notices, Board Hearing documents, and workshop materials from 2017. All relevant documents are available on the official CARB regulatory website for the 2018 HD OBD rulemaking.
Accessing Official HD OBD Regulations
The official, legally binding versions of the HD OBD and associated enforcement regulations (sections 1971.1 and 1971.5, title 13, California Code of Regulations (CCR)) are published on the Barclays Official California Code of Regulations website: www.oal.ca.gov. This resource provides the most up-to-date and accurate information regarding HD OBD compliance requirements.
Staying Informed about HD OBD
Keeping up with HD OBD regulatory changes is essential for compliance. Refer to the official CARB and OAL websites for the latest information and regulatory documents. These resources provide valuable insights into current and upcoming HD OBD requirements for heavy-duty vehicles in California.
