FAQs – Peterbilt

FAQ – Clean Truck Check – HD I/M Program

In 2024, California is intensifying its emissions testing program with the introduction of the Clean Truck Check. To prevent non-compliant trucks from operating, the state is implementing stricter emissions standards for diesel vehicles.

This updated program will include testing for on-highway commercial trucks, RVs registered in California, as well as qualifying personal vehicles and agricultural equipment.

We’ve gathered a list of Frequently Asked Questions (FAQs) and useful links to help you understand the requirements for operating your diesel vehicle in California.

Clean Truck Check – FAQ:

What does the Clean Truck Check test consist of?

To comply with the Clean Truck Check program, your vehicle will need one of two possible tests:

For vehicles equipped with OBD (2013 and newer), we will conduct the HD I/M test, and the results will be electronically submitted to CARB.
For vehicles older than 2013, we will perform a functional inspection and PSIP test (commonly known as an opacity test) to assess compliance. To conduct this test, access to the engine data plate, exhaust system, and throttle is required.

What Else Do I Need to Do?

Along with completing the physical vehicle testing, you’ll need to access the online CARB portal to pay the annual fee.

Does Diesel Emissions Service Provide Clean Truck Check – HD I/M Testing?

Yes, we do! Our CARB-certified staff and equipment are ready to assist you at our locations in Redding, CA, and Sacramento, CA.

Who Needs to Participate in the CTC-VIS Program?

All diesel and hybrid vehicles with a gross vehicle weight rating (GVWR) over 14,000 lbs must comply with the Clean Truck Check program. The GVWR is usually listed on the driver’s side door jamb label. Even non-commercial vehicles like RVs are included in this program if they are registered in California.

Which Vehicles Are Exempt from the Regulation?

The following heavy-duty vehicle types are not subject to this regulation:

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 under California Vehicle Code Section 5004)
New Vehicles with Certified Engines meeting the most stringent optional NOx standard (≤ 0.01 g/bhp-hr) – Exempt during the initial four years of Clean Truck Check implementation (2023-2027).
Motorhomes Registered Outside California
Vehicles with Experimental Permits (Authorized by California Health and Safety Code Section 43014).

When is My Testing Deadline?

Starting January 2025, California-registered vehicles must complete testing by a deadline aligned with their registration date. For out-of-state vehicles, deadlines will depend on the last digit of the VIN. Refer to Table II in the link below for details.

Important Milestones Diagram

NEXT STEPS

Clean Truck Check: Now Enforced
To comply with California’s emissions standards, your truck may be randomly selected for roadside testing using emissions monitoring devices. If flagged for high emissions, you’ll receive a Notice to Submit to Testing.

Steps to Follow:

Schedule a Test: Get your truck tested at a certified emissions facility within 30 days.
Make Necessary Repairs: Address any issues to ensure your truck meets emissions standards.
Avoid Penalties: Non-compliance with the Notice or emissions standards could lead to further testing and penalties.

2024 Vehicle Compliance Deadline
All vehicles must meet compliance standards between July 1st and December 31st, 2024. To stay compliant:

Pay the 2024 Annual Compliance Fee: Ensure payment is made by the deadline.
Resolve Outstanding Violations: Address any unresolved enforcement issues before the compliance date.

Failure to comply may result in penalties or usage restrictions. Stay ahead—take action now!

Stay in the Loop

Stay Compliant with Clean Truck Check Regulations

Avoid penalties and DMV registration holds by staying informed about Clean Truck Check requirements.

Get the Details:
Learn more about Clean Truck Check by visiting the official page: Clean Truck Check

Stay Informed:
Subscribe for automatic email updates on Clean Truck Check implementation and related activities.

Need Assistance?
For questions, contact CARB staff at mhdim@arb.ca.gov or call their compliance assistance hotline at 1-866-634-3735 for support with CARB regulations.