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TRUCK & BUS REGULATION
Regulation Text


REGULATION BASICS & EXEMPTIONS

Diesel trucks and buses with a Gross Vehicle Weight Rating(GVWR) that is greater than 14,001 pounds (lbs), must reduce exhaust emissions by meeting particulate matter (PM) filter requirements and upgrading to a 2010 or newer engine model year (EMY).

The Regulation applies to:

  • Diesel vehicles with a GVWR greater than 14,000 lbs.
  • Privately and federally owned trucks and buses that operate in California
  • Any person, business, school district, tribal reservation, or federal government agency that owns, operates, leases or rents affected vehicles.
The Regulation does not apply to:



PROGRAM HOMEPAGE ►


CUMMINS RECALL
On August 1, 2018, Cummins initiated a recall of the Selective Catalytic Reduction (SCR) unit catalysts in their 2010 to 2015 model year medium and heavy-duty engines. This recall affects over 500,000 heavy-duty vehicles nationwide. Customer letters for the first phase of the recall were sent to vehicle owners by Cummins starting August 1. Vehicles are to be brought to a Cummins certified service location for replacement catalysts and/or software upgrades.

For assistance, including locating your nearest Cummins certified service location or determining whether your engine is covered by the recall, please contact Cummins Care on the web at https://care.cummins.com or call Cummins at 1-800-CUMMINS (1-800-286-6467).

• Cummins will reimburse cost of previously replaced catalyst.

• California Department of Motor Vehicles may require the completion of emission campaign repairs prior to vehicle registration renewal.

• Cummins will phase-in recalls over time due to the large number of engine families involved. Some recalls will take effect in 2019 as shown in the table below. The table will be updated, as new engine families are included in the recall campaign.

• For 2010-2012 model year ISX 15 Engine Families ACEXH0912XAP, BCEXH0912XAP, and CCEXH0912XAP, and 2013 model year Engine Family DCEXH0912XAT, SCR replacement will occur when the SCR catalyst fails (triggers applicable engine lights/fault codes) within useful life beginning Aug. 1, 2018. Customer letters forthese four engine families only will not be mailed out.

• If your engine family is not listed below and you replaced your catalyst or if you have additional questions, please contact the CARB helpline at 1-800-242-4450.

Engine Model Year

Engine Size (Liters)

Cummins Engine

Engine Family

Date Recall Takes Effect

2010

6.7

ISB

ACEXH0408BAH

03/24/2019

6.7

RAM 3500 Cab Chassis

ACEXH0408BAK

01/08/19

6.7

RAM 4500/5500 Cab Chassis

ACEXH0408BAL

1Q2019

6.7

ISB - Urban Bus Hybrid

ACEXH0408BAN

03/24/2019

8.3

ISC

ACEXH0505CAC

03/24/2019

8.9

ISL9

ACEXH0540LAQ

03/24/2019

8.9

ISL9 - Urban Bus

ACEXH0540LAR

03/24/2019

11.9

ISX 12

ACEXH0729XAA

09/28/2018

11.9

ISX 12

ACEXH0729XAB

09/28/2018

11.9

ISX 12

ACEXH0729XAC

09/28/2018

14.9

ISX 15

ACEXH0912XAQ

08/01/2018

14.9

ISX 15

ACEXH0912XAR

09/28/2018

2011

6.7

ISB

BCEXH0408BAH

03/24/2019

6.7

RAM 3500 Cab Chassis

BCEXH0408BAK

01/08/19

6.7

RAM 4500/5500 Cab Chassis

BCEXH0408BAL

01/08/19

6.7

ISB - Urban Bus Hybrid

BCEXH0408BAN

03/24/2019

8.3

ISC

BCEXH0505CAC

03/24/2019

8.9

ISL9

BCEXH0540LAQ

03/24/2019

8.9

ISL9 - Urban Bus

BCEXH0540LAR

03/24/2019

8.9

ISL9

BCEXH0540LAS

03/24/2019

11.9

ISX 12

BCEXH0729XAA

09/28/2018

11.9

ISX 12

BCEXH0729XAB

09/28/2018

11.9

ISX 12

BCEXH0729XAC

09/28/2018

11.9

ISX 12 – Urban Bus

BCEXH0729XAD

09/28/2018

14.9

ISX 15

BCEXH0912XAQ

08/01/2018

14.9

ISX 15

BCEXH0912XAR

09/28/2018

14.9

ISX 15

BCEXH0912XAS

08/01/2018

2012

6.7

ISB

CCEXH0408BAH

03/24/2019

6.7

RAM 3500 Cab Chassis

CCEXH0408BAK

01/08/19

6.7

RAM 4500/5500 Cab Chassis

CCEXH0408BAL

01/08/19

6.7

ISB - Urban Bus Hybrid

CCEXH0408BAN

03/24/2019

6.7

ISB

CCEXH0408BAO

03/24/2019

8.3

ISC

CCEXH0505CAC

03/24/2019

8.9

ISL9

CCEXH0540LAQ

03/24/2019

8.9

ISL9 - Urban Bus

CCEXH0540LAR

03/24/2019

8.9

ISL9

CCEXH0540LAS

03/24/2019

11.9

ISX 12

CCEXH0729XAA

09/28/2018

11.9

ISX 12

CCEXH0729XAB

09/28/2018

11.9

ISX 12

CCEXH0729XAC

09/28/2018

11.9

ISX 12 - Urban Bus

CCEXH0729XAD

09/28/2018

14.9

ISX 15

CCEXH0912XAQ

08/01/2018

14.9

ISX 15

CCEXH0912XAR

09/28/2018

14.9

ISX 15

CCEXH0912XAS

08/01/2018

2013

6.7

RAM 2500-3500 (MDV)

DCEXD06.78VV

2017

6.7

RAM 3500 (MDV)

DCEXD06.78WV

2017

6.7

ISB, ISB Hybrid

DCEXH0408BAP

03/24/2019

6.7

ISB Hybrid

DCEXH0408BAR

03/24/2019

6.7

RAM 3500 Cab Chassis

DCEXH0408BAQ

01/08/19

6.7

RAM 4500/5500 Cab Chassis

DCEXH0408BAS

01/08/19

8.9

ISL9, ISL9 Hybrid (Urban Bus)

DCEXH0540LAT

2017

8.9

ISL9, ISL9 Hybrid

DCEXH0540LAV

03/24/2019

11.9

ISX 12

DCEXH0729XAE

09/28/2018

11.9

ISX 12 Urban Bus

DCEXH0729XAF

09/28/2018

2014

6.7

RAM 2500-3500 (MDV)

ECEXD06.78VV

2017

6.7

RAM 3500 (MDV)

ECEXD06.78WV

2017

6.7

ISB, ISB Hybrid

ECEXH0408BAP

03/24/2019

6.7

ISB Hybrid

ECEXH0408BAR

03/24/2019

6.7

RAM 3500 Cab Chassis

ECEXH0408BAQ

01/08/19

6.7

RAM 4500/5500 Cab Chassis

ECEXH0408BAS

01/08/19

8.9

ISL9, ISL9 Hybrid (Urban Bus)

ECEXH0540LAT

2017

8.9

ISL9, ISL9 Hybrid

ECEXH0540LAV

03/24/2019

2015

6.7

RAM 2500-3500 (MDV)

FCEXD06.78VV

2017

6.7

RAM 3500 (MDV)

FCEXD06.78WV

2017

6.7

RAM 3500 Cab Chassis

FCEXH0408BAQ

01/08/19

6.7

RAM 4500/5500 Cab Chassis

FCEXH0408BAS

01/08/19



REGULATION REQUIREMENTS

Diesel trucks and buses with a Gross Vehicle Weight Rating(GVWR) that is greater than 14,001 pounds (lbs), must reduce exhaust emissions by meeting particulate matter (PM) filter requirements and upgrading to a 2010 or newer engine model year (EMY).

Lighter vehicles between 14,001 and 26,000lbs GVWR: 1995 and older model year engines need to be replaced or repowered by 1/1/15. 1996 model year engines need to be replaced or repowered by 1/1/16. 1997 and older model year engines need to be replaced or repowered by 1/1/17. 1999 and older engines need to be replaced or repowered by 1/1/19. 2000-2003 model year engines need to be replaced or repowered by 1/1/20. 2004-2006 model year engines need to be replaced or repowered by 1/1/21. 2007-2009 model year engines need to be replaced by 1/1/23.Heavy vehicles above 26,000lbs GVWR: 1993 and older model year engines need no particulate matter filter, but require repower or replacement by 1/1/15. 1994-1995 model year engines require no particulate filter, but require repower or replacement by 1/1/16. 1996-1999 model year engines required a particulate matter filter by 1/1/12, and will require a repower or replacement by 1/1/20. 2000-2004 model year engines required a particulate matter filter by 1/1/13, and require a repower or replacement by 1/1/21. 2005-2006 model year engines required a particulate matter filter by 1/1/14, and will require a repower or replacement by 1/1/22. 2007-2009 model year engines required a particulate matter filter by 1/1/14 if not allready manufacturer-equipped, and require repower or replacement by 1/1/23.
Lighter vehicles between 14,001 and 26,000lbs GVWR: 1995 and older model year engines need to be replaced or repowered by 1/1/15. 1996 model year engines need to be replaced or repowered by 1/1/16. 1997 and older model year engines need to be replaced or repowered by 1/1/17. 1999 and older engines need to be replaced or repowered by 1/1/19. 2000-2003 model year engines need to be replaced or repowered by 1/1/20. 2004-2006 model year engines need to be replaced or repowered by 1/1/21. 2007-2009 model year engines need to be replaced by 1/1/23. 
Heavy vehicles above 26,000lbs GVWR: 1993 and older model year engines need no particulate matter filter, but require repower or replacement by 1/1/15. 1994-1995 model year engines require no particulate filter, but require repower or replacement by 1/1/16. 1996-1999 model year engines required a particulate matter filter by 1/1/12, and will require a repower or replacement by 1/1/20. 2000-2004 model year engines required a particulate matter filter by 1/1/13, and require a repower or replacement by 1/1/21. 2005-2006 model year engines required a particulate matter filter by 1/1/14, and will require a repower or replacement by 1/1/22. 2007-2009 model year engines required a particulate matter filter by 1/1/14 if not allready manufacturer-equipped, and require repower or replacement by 1/1/23.


ENGINE REPLACEMENT GUIDE ►
Find out if or when your vehicle is subject to DMV registration denials or holds.


SCHOOL BUSES
School Bus Vehicles powered by diesel fuel with a Gross Vehicle Weight Rating (GVWR) of greater than 14,000 pounds that provide transportation of any school pupil at or below the 12th-grade level or to or from a public or private school, or to or from public or private school activities are subject to the Truck and Bus Regulation.

Previously, school buses that could not be retrofitted (e.g. 2-stroke engine buses), could delay their compliance until January 1, 2018 with an approved extension.

School Bus Fact Sheet
School Bus Idling Fact Sheet
School Bus Funding ►
School Bus Webinar ►


FLEXIBILITY OPTIONS
LOW USE EXEMPTION
Low-use vehicles are vehicles that travel less than 1,000 miles per year, including vehicles that are not operated (even if they have a non-op registration). A vehicle that travels more than 1,000 miles annually can use the low-use vehicle exemption as long as it operates less than 1,000 miles within California each year. The low-use option allows the vehicle to be exempt from PM filter and engine replacement requirements. Annual odometer reporting is required. Annual reporting in the TRUCRS reporting system is required to demonstrate compliance with this option.

Low-use Exemption Fact Sheet

NOx EXEMPT AREA FLEXIBILTY OPTION
Vehicles that are operated in certain areas of the state with cleaner air may be eligible to use the NOx Exempt Area Extension to phase-in PM filter retrofits. Beginning January 1, 2020 vehicles can remain under the NOx option and avoid vehicle replacement or upgrade the vehicle based on the engine model year schedule. Annual reporting in the TRUCRS reporting system is required to demonstrate compliance with this option.

NOx Exemption Area Fact Sheet


LAWSON LAWSUIT

In 2014, to void the flexibility options provided in the 2014 amendments to the Truck and Bus regulation (regulation), John R. Lawson Rock and Oil of Fresno (Lawson) and the California Trucking Association (CTA) sued the California Air Resources Board (CARB) in Fresno County Superior court.

In 2016, that court ruled in favor of Lawson and CTA, ordering CARB to set aside the regulation’s 2014 amendments. CARB appealed that decision to the 5th District court of Appeals.

On January 31, 2018, the appellate court issued its decision upholding parts of the lower court’s ruling, including the court’s direction to set aside the regulation’s 2014 amendments.

If vehicles in your fleet are using one or more of the flexibility options that CARB added or amended in 2014, you will be impacted by the court’s decision.

MORE INFORMATION ►



DMV COMPLIANCE VERIFICATION

On January 1, 2020, a new enforcement tool will ensure that vehicles subject to the California Air Resources Board’s (CARB) Truck and Bus Regulation must meet the health-based requirements of that rule prior to obtaining registration through the DMV.

Any registration due after December 31, 2019 is affected. Beginning January 1, 2020, the Department of Motor Vehicles (DMV) CANNOT register any vehicle that does not meet the requirements of the Truck and Bus Regulation.

MORE INFORMATION ►
ENGINE REPLACEMENT GUIDE ►
Find out if or when your vehicle is subject to DMV registration denials or holds.



FILTER INFORMATION

DPF/soot filters (diesel particulate filter, VDECS, PM filter, exhaust retrofit)



UPCOMING DEADLINES

JANUARY 1, 2020
  • DMV automatic compliance verification begins. A new enforcement tool will ensure that vehicles subject to the California Air Resources Board’s (CARB) Truck and Bus Regulation must meet the health-based requirements of that rule prior to obtaining registration through the DMV.

  • Light vehicles (14,001-26,000 lbs GVWR) with Engine Model Year 2003 or older need to be replaced or repowered to a 2010 or newer model year engine.

  • Heavy vehicles (Greater than 26,000 lbs GVWR) with Engine Model Year 1999 or older need to be replaced or repowered to a 2010 or newer model year engine.

ENGINE REPLACEMENT GUIDE ►
Find out if or when your vehicle is subject to DMV registration denials or holds.


REGULATION TIMELINE

Truck and Bus Regulation - Highlighted engine requirement timelines (other requirements exist) 2019: Lighter vehicles with 1999 or older EMY* must be replaced or repowered already.
Heavier vehicles with 1995 or older EMY* must be replaced or repowered as of 2016.

2020: DMV Compliance Verification Begins. 
Lighter vehicles with 2003 or older EMY* must be replaced or repowered.
Heavier vehicles with 1999 or older EMY* must be replaced or repowered. 

2021: Lighter vehicles with 2006 or older EMY* must be replaced or repowered. Heavier vehicles with 2004 or older EMY* must be replaced or repowered.

2022: Heavier vehicles with 2006 or older EMY* must be replaced or repowered.

2023: Lighter vehicles with 2009 or older EMY* must be replaced or repowered. Heavier vehicles with 2009 or older EMY* must be replaced or repowered. 

*This timeline applies to diesel buses and trucks unless you are using a compliance option and reporting in TRUCRS. This timeline follows a scheduel for Engine Model Year (EMY). The Vehicle Model Year usually runs one year ahead of Engine Model Year.

Lighter vehicles - 14,001 - 26,000 lbs GVWR. Heavier vehices - Greater than 26,000lbs GVWR.
Truck and Bus Regulation - Highlighted engine requirement timelines (other requirements exist) 2019: Lighter vehicles with 1999 or older EMY* must be replaced or repowered already.
Heavier vehicles with 1995 or older EMY* must be replaced or repowered as of 2016.
2020: DMV Compliance Verification Begins.
Lighter vehicles with 2003 or older EMY* must be replaced or repowered.
Heavier vehicles with 1999 or older EMY* must be replaced or repowered.
2021: Lighter vehicles with 2006 or older EMY* must be replaced or repowered. Heavier vehicles with 2004 or older EMY* must be replaced or repowered.
2022: Heavier vehicles with 2006 or older EMY* must be replaced or repowered.
2023: Lighter vehicles with 2009 or older EMY* must be replaced or repowered. Heavier vehicles with 2009 or older EMY* must be replaced or repowered.
*This timeline applies to diesel buses and trucks unless you are using a compliance option and reporting in TRUCRS. This timeline follows a scheduel for Engine Model Year (EMY). The Vehicle Model Year usually runs one year ahead of Engine Model Year.
Lighter vehicles - 14,001 - 26,000 lbs GVWR. Heavier vehices - Greater than 26,000lbs GVWR.