The California Air Resources Board will discuss its proposed
heavy-duty diesel engine software upgrade regulation during a public hearing
scheduled for 9 a.m. Oct. 23 at the ARB offices in Sacramento, CA, the board
The proposed software upgrade regulation requires
installation of software to reduce emissions of oxides of nitrogen (NOx) in
heavy-duty vehicles from 1993-1999 model years.
The software upgrades, referred to as low NOx software, were
developed in the 1990s as a result of negotiations between the U.S.
Environmental Protection Agency, the ARM and seven engine manufacturers. Owners
of eligible vehicles are both responsible for installing upgraded software
under the proposed regulation. In addition, dealers who sell used trucks
covered under the regulation must also install the upgrade.
The ARB notice says the meeting could continue on through
Oct. 24. To read the complete public hearing notice, go to http://www.arb.ca.gov/msprog/hdsoftware/hearingnotice/hnotice.pdf.