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In 2007, the EPA added three new Supplemental Federal Test Procedure (SFTP) tests [12] that combine the current city and highway cycles to reflect real world fuel economy more accurately,. Estimates are available for vehicles back to the 1985 model year.
Annually. OBDII testing for 1996 model year or newer; Two-Speed Idle Test for older vehicles. 1968 model year or newer. New vehicles on their third registration; first and second registrations are exempted. GVWR ≥14,000 exempt, as are full time four wheel drive light duty diesels with a wheelbase ≥182 inches. Annually.
Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.
The "10 - 15 Mode Hot Cycle" test, used to determine individual fuel economy ratings and emissions observed from the vehicle being tested, use a specific testing regime. [ 41 ] [ 42 ] [ 43 ]
U.S. engine maker facing largest Clean Air Act penalty ever over emissions test cheating accusations. Rob Wile. December 22, 2023 at 4:09 PM. ... From fiscal years 2020 to 2023, the Environmental ...
The first legislated exhaust (tailpipe) emission standards were promulgated by the State of California for 1966 model year for cars sold in that state, followed by the United States as a whole in model year 1968. Also in 1966, the first emission test cycle was enacted in the State of California measuring tailpipe emissions in PPM (parts per ...
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