Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 19, 1998.
As of Wednesday, June 19th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1995 and older vehicles except those equipped with OBD II or Enhanced Evaporative Control systemsTubing from the PCV valve is connected to a perforated railing that is partially submerged in a solution of dihydroxypropane and purified water. Vapor from the solution enters the engine through the PCV system

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-426-1
  • Executive Order 426-1 / D426-1
  • ARB # D-426-1
  • Executive Order No: D-426-1
  • C.A.R.B. No. D-426-1
  • Resolution D-426-1
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-426-1 PDF

D-426-1 Document:

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