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Clean Truck Check requirements
What vehicles are affected by Clean Truck Check?
Clean Truck Check applies to nearly all diesel and alternative fuel heavy-duty vehicles with a gross vehicle weight rating (GVWR) over 14,000 pounds that operate on California public roads and highways even if they are not registered in California. This includes public vehicles (federal, state, and local government); motorcoaches; transit, shuttle and school buses; hybrid vehicles; commercial vehicles; personal vehicles; California registered motorhomes; single vehicle fleets; and vehicles registered outside of California (not including motorhomes).
What vehicles are not subject to Clean Truck Check?
The Clean Truck Check Program does not apply to:
Do I have to report for Clean Truck Check if my vehicles aren’t registered in CA?
Yes, almost all non-gasoline heavy-duty vehicles with a GVWR over 14,000 lbs. that operate in CA must be compliant with Clean Truck Check. All vehicles that are operating on California public roads and highways are required to comply with the Clean Truck Check program which includes reporting, compliance fees, and emissions testing.
To maintain a level playing field between trucks registered in California and trucks registered in other states, staff conducts roadside inspections at border crossings, outside ports and railyards and throughout the state. Remote Emissions Monitoring Devices (REMD) and Automated License Plate Reader (ALPR) are also deployed throughout the state to verify compliance. Further, CARB coordinates enforcement efforts with California Highway Patrol and other public agencies to enhance enforcement efforts. California Highway Patrol (CHP) has the authority to conduct Clean Truck Check inspections. In addition, non-compliant vehicles may be denied entry into ports and railyards.
How will Clean Truck Check be enforced during roadside inspections for vehicles coming into CA?
Once a vehicle is stopped by CARB or CHP, the vehicle's Clean Truck Check compliance status will be evaluated, which includes reporting in CTC-VIS, payment of annual compliance fees and, soon, passing emissions compliance tests submission when applicable.
Do I have to report for Clean Truck Check if I have SE plates?
Yes, if you have SE plates you still must meet the Clean Truck Check reporting, annual compliance fee and emissions testing requirements. SE plated vehicles will follow a compliance deadline schedule according to the DMV registration expiration date. Please contact DMV for your official registration expiration date.
If you vehicle is subject to annual compliance (motor home/Agricultural) please see Annual Compliance Requirements for more details.
If you are a semi-annual subject vehicle please see please see Semi-Annual Compliance Requirements.
For example a vehicle with the expiration date of 12/31/25 will have an compliance deadline of 12/31,
Do I have to report for Clean Truck Check if I have DMV Exempt plates?
DMV exempt vehicles (e.g., government vehicles) will follow a compliance deadline schedule according to the last digit of the VIN.
If you vehicle is subject to annual compliance (motor home/Agricultural) please see Annual Compliance Requirements for more details.
If you are a semi-annual subject vehicle please see please see Semi-Annual Compliance Requirements.
Clean Truck Check applies to nearly all diesel and alternative fuel heavy-duty vehicles with a gross vehicle weight rating (GVWR) over 14,000 pounds that operate on California public roads and highways even if they are not registered in California. This includes public vehicles (federal, state, and local government); motorcoaches; transit, shuttle and school buses; hybrid vehicles; commercial vehicles; personal vehicles; California registered motorhomes; single vehicle fleets; and vehicles registered outside of California (not including motorhomes).
What vehicles are not subject to Clean Truck Check?
The Clean Truck Check Program does not apply to:
- Zero-emission vehicles
- Military tactical vehicles (title 13, CCR, section 1905)
- Emergency vehicles (California Vehicle Code section 165 or California Health and Safety Code section 1797.84)
- Historical vehicles (authorized by California Vehicle Code section 5004)
- New vehicles with engines certified to the most stringent optional, NOx standard (less than or equal to 0.01 g/bhp-hr) -This applies only during the first four years of Clean Truck Check implementation (2023-2027) Please contact us if you believe your vehicle meets this standard.
- Motorhomes registered outside of California
- Vehicles operating under an experimental permit (authorized by California Health and Safety Code section 4301)
Do I have to report for Clean Truck Check if my vehicles aren’t registered in CA?
Yes, almost all non-gasoline heavy-duty vehicles with a GVWR over 14,000 lbs. that operate in CA must be compliant with Clean Truck Check. All vehicles that are operating on California public roads and highways are required to comply with the Clean Truck Check program which includes reporting, compliance fees, and emissions testing.
To maintain a level playing field between trucks registered in California and trucks registered in other states, staff conducts roadside inspections at border crossings, outside ports and railyards and throughout the state. Remote Emissions Monitoring Devices (REMD) and Automated License Plate Reader (ALPR) are also deployed throughout the state to verify compliance. Further, CARB coordinates enforcement efforts with California Highway Patrol and other public agencies to enhance enforcement efforts. California Highway Patrol (CHP) has the authority to conduct Clean Truck Check inspections. In addition, non-compliant vehicles may be denied entry into ports and railyards.
How will Clean Truck Check be enforced during roadside inspections for vehicles coming into CA?
Once a vehicle is stopped by CARB or CHP, the vehicle's Clean Truck Check compliance status will be evaluated, which includes reporting in CTC-VIS, payment of annual compliance fees and, soon, passing emissions compliance tests submission when applicable.
Do I have to report for Clean Truck Check if I have SE plates?
Yes, if you have SE plates you still must meet the Clean Truck Check reporting, annual compliance fee and emissions testing requirements. SE plated vehicles will follow a compliance deadline schedule according to the DMV registration expiration date. Please contact DMV for your official registration expiration date.
If you vehicle is subject to annual compliance (motor home/Agricultural) please see Annual Compliance Requirements for more details.
If you are a semi-annual subject vehicle please see please see Semi-Annual Compliance Requirements.
For example a vehicle with the expiration date of 12/31/25 will have an compliance deadline of 12/31,
Do I have to report for Clean Truck Check if I have DMV Exempt plates?
DMV exempt vehicles (e.g., government vehicles) will follow a compliance deadline schedule according to the last digit of the VIN.
If you vehicle is subject to annual compliance (motor home/Agricultural) please see Annual Compliance Requirements for more details.
If you are a semi-annual subject vehicle please see please see Semi-Annual Compliance Requirements.