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Emission Standards Reference Guide

Light-Duty Vehicle, Light-Duty Truck, and Medium-Duty Passenger Vehicle -- Tier 2 and Interim Non-Tier 2 Supplemental Federal Test Procedure Exhaust Emission Standards

Vehicle Type 4,000 Miles
US06 TEST SC03 TEST
NMHC + NOx
(g/mi)
CO
(g/mi)
NMHC + NOx
(g/mi)
CO
(g/mi)
Federala LDV / LDT1 0.14 8.0 0.20 2.7
LDT2 0.25 10.5 0.27 3.5
LDT3 0.40 10.5 0.31 3.5
LDT4 0.60 11.8 0.44 4.0

 

Notes:

a  Manufacturers must calculate their applicable full useful life Supplemental Federal Test Procedure standards for non-methane hydrocarbon plus nitrogen oxides, particulate matter, and carbon monoxide (CO), if using the weighted CO standard. If not using the weighted CO standard, manufacturers may use the full useful life stand-alone Tier 1 standards for US06 and SC03.

Code of Federal Regulations (CFR) Citations:

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