Low Emission Vehicle Classifications
Acronym Classification Details
TLEV Transitional Low Emission Vehicle Required under a certain level of tailpipe emissions. Major emissions with specific standards include non-methane organic gasses (NMOG), carbon monoxide (CO), nitrous oxide (NOx), particulate matter (PM), and formaldehyde (HCHO).
LEV Low Emission Vehicle Stricter emissions requirements than TLEV.
ULEV Ultra Low Emission Vehicle Stricter emissions requirements than LEV.
SULEV Super Ultra Low Emission Vehicle Stricter emissions requirements than ULEV.
PZEV Partial Zero Emission Vehicle Zero evaporative emissions from fuel system, 15 year or 150K mile warranty on emission-control components, meets SULEV tailpipe emissions standards
AT-PZEV Advanced Technology Partial Zero Emissions Vehicle PZEV standards plus uses no gasoline or gets "much better fuel efficiency due to the use of hybrid electric vehicle systems."
TZEV Transitional Zero Emission Vehicle Additional category for plug-in hybrids. Meets PZEV standards plus warranty traction battery for 10 years or 150K miles.

Last Updated 7/5/2012 by Scott Arnold Valid HTML 4.0 Transitional