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On-Board Diagnostics (OBD)

OBD Logo - Check Engine Light Regulatory and Technical Resources

This section features links to a variety of regulatory and technical documents including current rulemakings, guidance, public testimony, and policy recommendations from EPA. It also includes resources and opportunities for technician training.

The resources are organized into the following categories:

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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