Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 13, 2007.
As of Saturday, February 24th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1988-2006 model-year 4-stroke diesel engines with turbocharging and charge air coolingThis exemption excludes all engines originally equipped with an aftertreatment emission control system such as a catalytic converter or a diesel particulate filter.This exemption is only valid provided the engines meet the following operating condition: the engine exhaust temperature exceeds 280 degrees Celsius for at least 25 percent of the typical duty cycle. The engines can be operated on California diesel (15 ppm sulfur), PuriNOx water emulsion fuel based on California diesel, or biodiesel blends containing no more than 20 percent biodiesel by volume.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-420-12
  • Executive Order 420-12 / D420-12
  • ARB # D-420-12
  • Executive Order No: D-420-12
  • C.A.R.B. No. D-420-12
  • Resolution D-420-12
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-420-12 PDF

D-420-12 Document:

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