Regulations Requiring Onboard Diagnostic Systems on 2010 and Later Heavy-Duty Engines Used in Highway Vehicles Over 14,000 Pounds: Revisions to Onboard Diagnostic Requirements for Diesel Highway Vehicles Under 14,000 Pounds, Draft Technical Support Document.
This document contains technical details in support of the proposed requirements for onboard diagnostic (OBD) systems on highway applications over 14,000 pounds, and the proposed revisions to existing OBD requirements on highway diesel applications under 14,000 pounds.
|Office of Air and Radiation|
|Compliance and Innovative Strategies Division|
|Office of Transportation and Air Quality|