Matthew Rodriquez Secretary for En v ironment al Protec ti on February 12 , 2014 

# Air Resources Board Mary D. Nichols, Chairman

1001 I Street • P . O . Box 2815 Sacramento , California 95812 • www . arb . ca . gov

Administrator Gina McCarthy United States Environmental Protection Agency Headquarters Ariel Rios Building 1200 Pennsylvania Avenue , N.W. Mail Code 1101A Washington , D.C . 20460 Edmund G . Brown Jr. Govern or

RE : Request for Waiver Action Pursuant to Clean Air Act Section 209(b) for California ' s Heavy-Duty Engine On-Board Diagnostic System Requirements (HD OBD) and On-Board Diagnostic System Requirements for Passenger Cars , Light- Duty Trucks , and Medium - Duty Vehicles and Engines (OBD II) Dear Administrator McCarthy : In 2012, the California Air Resources Board (CARS) adopted amendments to the regulation entitled "Malfunction and Diagnostic System Requirements -- 2004 and Subsequent Model -Year Passenger Cars , Light- Duty Trucks, and Medium - Duty Vehicles and Engines (OBD II Requirements) ,1 and to the regulation entitled " Enforcement of Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model-Year Passenger Cars , Light- Duty Trucks , and Medium - Duty Vehicles and Engines " (OBD II Enforcement Regulation) . 2

. CARS subsequently adopted amendments in 2013 to its regulation entitled "Malfunction and Diagnostic System Requirements for 2010 and Subsequent Model-Year HeavyDuty Engines " (HD OBD Requirements) , 3 the regulation entitled " Enforcement of Malfunction and Diagnostic System Requirements for 2010 and Subsequent Model Year Heavy-Duty Engines " (HD OBD Enforcement Regulation) , 4 and to the OBD II Requirements and the OBD II Enforcement Regulation. I am writing to request that the United States Environmental Protection Agency (EPA) 1 Titl e 1 3, Ca lif o rnia Code of Re gulations (CCR ) sect io n 1 968 .2 2 Tit le 1 3, Ca lifornia Cod e of Re gulation s (CC R) sect io n 1968 .5 3 Tit le 1 3, Ca lifornia Cod e of Re gulations (CCR ) secti o n 1 971 . 1 4 Titl e 1 3, Ca lifo rni a C ode of Re gul ations ( CCR) s ection 1 97 1 .5

T h e ener gy c h allenge facing California is real. Every Cal ifornian nee ds to take imm ed iate action to reduce energy consumption. For a lis t ofsimpl e ways you can red uce de mand an d c ut yo ur energy costs, see our websit e: http ://www . arb . ca . qov . C a lifornia Environm e ntal Protec tion Ag e ncy Printed o n Rec ycled PaperGina McCarthy, Administrator February 12, 2014 Page 2

take appropriate waiver action on California's 2012 and 2013 amendments to its onboard diagnostic system requirements applicable to light- , medium- , and heavy-duty vehicles and engines . I am enclosing our waiver analysis , which includes a description of the 2012 and 2013 amendments to the OBD II Requirements and OBD II Enforcement Regulation , and the 2013 amendments to the HD OBD Requirements and HD OBD Enfo rcement Regulation , a review of the criteria governing EPA's evaluation of a California waiver request, and our rationale supporting our request, including supporting documents that are included in the enclosed CD-ROM for your convenience . If you need additional technical information on this item , please contact Mr . Michael Regenfuss, Manager of ARB ' s Engineering Studies Branch at (626) 575- 7004 or mregenfu@arb
. ca . gov . You may address legal questions to Alexander Wang , Senior Staff Counsel , at (916) 323-9610 or awang@arb
. ca . gov . Sincerely ,



# ~f **~** Executive Officer Attachm e nt EnclosuresGina McCarthy , Administrator February 12 , 2014 Page 3

cc: David Dickinson (w/attch . and encls . ) Attorney/Advisor United States Environmental Protection Agency Ariel Rios Building 1200 Pennsylvania Avenue , N .W . Mail Code 6405J Washington, DC 20460 Janet Cohen (w/attach. and encls . ) Associate Director , Compliance Division United States Environmental Protection Agency Office of Transportation and Air Quality 2000 Traverwood Ann Arbor, Michigan 48105 Michael Regenfuss , Manager of Engineering Studies Branch Mobile Source Control Division (w/attach . and encls . ) Alexander Wang , Senior Staff Counsel Office of Legal Affairs (w/attach. and encls . ) Michael Terris, Assistant Chief Counsel Office of Legal Affairs (w/attach.)