40 CFR §86.007-17 — -17 Onboard diagnostics for engines used in applications less than or equal to 14,000 pounds GVWR.
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Heavy-duty engines intended to be installed in heavy duty vehicles at or below 14,000 pounds GVWR that are subject to standards under this subpart must meet onboard diagnostic requirements as specified in § 86.1806.