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Avoid Clean Truck Check Registration Holds!

The California Air Resources Board mandates that heavy-duty vehicles over 14,000 pounds operating on California roads be registered and regularly tested for emissions compliance.

This legislation applies to diesel motorhomes registered in the state and commercial trucks operating within California but registered elsewhere.

Failing to complete the Clean Truck Check process can significantly affect your operations. One of the most common consequences of non-compliance is a hold on your DMV registration, which means your vehicles will be stuck idle while you work to resolve the issue.

Partnering with CAARB provides an easy solution to keep your vehicles compliant. We will guide you through the registration process and ensure your vehicles are tested by a certified expert when needed. By working with our team, you can avoid the headaches associated with CARB compliance and keep your vehicles on the road.

What is Clean Truck Check?

The California Air Resources Board mandates that heavy-duty vehicles over 14,000 pounds operating on California roads be registered and regularly tested for emissions compliance.

Clean Truck Check is California’s smog inspection program for heavy-duty diesel vehicles. It ensures compliance with the state’s emissions regulations and helps maintain air quality. As of 2025, most heavy-duty vehicles must undergo semi-annual testing, with some exceptions for agricultural and recreational vehicles.

Clean Truck Check Pricing

In-Facility Inspections (Performed at Our Locations):

$180

2013 & Newer Heavy-Duty Vehicles

$240

2012 & Older Heavy-Duty Vehicles

Pass or Don’t Pay Guarantee – If your vehicle doesn’t pass, you don’t pay when inspected at any of our facilities!

OBD Pricing

$160/Truck

5+ Vehicles - Pass or Don't Pay

Clean Truck Check Requirements

Vehicles must meet California Air Resources Board (CARB) regulations.
Bring your registration or DMV paperwork for quick service.
Vehicles 14,000 lbs or more are subject to testing.
Any engine modifications must comply with CARB standards.
Out-of-state heavy-duty diesel vehicles require testing for CA registration.

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California Truck Emissions Testing & Compliance

Do You Have Questions About the

Clean Truck Check Program?

Many of our clients have shared concerns about maintaining their vehicles' CAARB compliance

under the new program. Below, you'll find answers to some frequently asked questions.

Registration

The ACF regulation sets a pathway to transition medium- and heavy-duty vehicles from diesel engines to zero-emission vehicles (ZEVs) by 2042, aiming for a significant reduction in carbon Bullet listemissions across California.

Compliance Fees

A $30 compliance fee is required for each qualified vehicle operating in California in 2023. For 2024, if a vehicle’s compliance deadline falls between July and December, an additional compliance fee will be necessary. This annual fee will become a standard part of your CTC compliance obligations.

Emissions Testing Requirements

Regular emissions testing will begin in 2025. Every vehicle in your fleet must undergo testing twice a year. By 2027, the testing frequency will increase to four times a year. Most qualified vehicles will need to pass an OBD test, while pre-2013 engines will require the older opacity test. All tests must be conducted by a credentialed tester.

Diesel Motorhome Notes

If your diesel motorhome has a GVWR exceeding 14,000 pounds and is registered in California, the CTC regulations mentioned above apply. You must register your vehicle and pay the compliance fee. However, motorhomes are only required to undergo testing once per year.

Out-of-State Trucks Notes

CTC requirements extend to vehicles registered outside of California that operate on state highways. You must register every vehicle in your fleet, pay the compliance fee, and receive scheduled emissions tests to continue operating legally in the state.

Do You Have Questions About

the Clean Truck Check Program?

Many of our clients have raised concerns about maintaining their vehicles' CAARB

compliance under the new program. Below are answers to some common questions.

How long does the smog check take?

2013 and newer vehicles: 15-30 minutes.

Do you accept same-day appointments?

We accept walk-ins, but wait times may vary. To schedule an appointment, visit our website.

What if my vehicle doesn’t pass the test?

You must get necessary repairs and return for a retest.

Do you offer fleet discounts?

Yes! Discounts are available for fleets with 5 or more vehicles. Contact us for details.

How often is testing required?

Most vehicles require semi-annual testing as of 2025.

What vehicles fall under the Clean Truck Check rules?

Most diesel and alternative fuel vehicles with a GVWR of 14,000 pounds that operate in California fall under CTC regulations.

How Can I Determine My CAARB Compliance Deadline?

For vehicles registered in California, the compliance deadline aligns with the DMV renewal date. For commercial trucks registered outside of California, the deadline is determined by the last digit of the vehicle's VIN.

Do I Need to Consider CTC Regulations If My Vehicle Is Registered in Another State?

Absolutely. The Clean Truck Check program aims to reduce emissions from all diesel vehicles operating in California, which includes those registered in other states.

Who Can Test My Vehicles?

Clean Truck Check testing must be conducted by a credentialed tester using approved equipment. CAARB has certified testers on staff who can assist you with this process. In some instances, you may prefer to have an in-house staff member become credentialed through CARB’s training course to manage this responsibility.

What Happens If I Ignore the Clean Truck Check Registration Process?

Operating a truck that is not in CAARB compliance can lead to financial penalties and DMV registration holds, preventing your vehicle from being on the road.