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You’ve got deadlines, routes to run, and a business that can’t afford downtime. The last thing you need is a DMV registration block or a $10,000-per-day fine because your 2013 or newer truck didn’t get its required CARB emissions testing done on time.
That’s where Clean Truck Check comes in. This isn’t optional anymore—it’s California law as of October 1, 2024. If your heavy-duty vehicle has a GVWR over 14,000 pounds and was built in 2013 or later, you’re required to submit passing emissions compliance testing to avoid penalties, registration holds, and enforcement action.
We handle CARB HD I/M testing for qualifying trucks right here in San Dimas, CA. You bring the truck, we run the test, and you get the documentation you need to stay compliant. No guessing. No surprises. Just straightforward testing that keeps you on the road and out of trouble with CARB.
We serve San Dimas and the surrounding areas with CARB certified smog check services built specifically for heavy-duty vehicle compliance. We’re not trying to be everything to everyone—we focus on what matters: getting your 2013 or newer truck through the Clean Truck Check process correctly.
San Dimas sits right in the heart of Southern California’s logistics corridor. That means we see owner-operators, fleet managers, and out-of-state drivers who need fast, accurate CARB emissions testing without the back-and-forth. We know the regulations, we know the deadlines, and we know what it takes to pass.
You’re not getting a generic smog test here. You’re getting heavy-duty vehicle compliance testing from a facility that understands CARB truck regulations and what’s at stake if you don’t meet them.
First, we verify your truck qualifies. That means it’s model year 2013 or newer and has a gross vehicle weight rating over 14,000 pounds. If it doesn’t meet both of those criteria, Clean Truck Check doesn’t apply to your vehicle.
Once we confirm eligibility, we run the CARB HD I/M testing using the equipment and procedures required by the state. This isn’t a visual inspection—it’s a full emissions compliance test that measures what’s coming out of your exhaust system. The test itself is straightforward, but it has to be done by a CARB credentialed tester who’s completed the required training and certification.
After the test, you get documentation showing whether your truck passed or failed. If it passes, that result gets submitted to CARB and satisfies your compliance deadline. If it doesn’t pass, we’ll walk you through what needs to happen next—whether that’s repairs, retesting, or working with a mechanic to address the issue.
You can submit your test results up to 90 days before your compliance deadline, so there’s no reason to wait until the last minute. Get it done early, and you won’t be scrambling when CARB sends a notice.
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This service applies only to trucks that meet California’s Clean Truck Check requirements: model year 2013 or newer, GVWR over 14,000 pounds. That includes diesel trucks, hybrid trucks, and alternative fuel vehicles that fall into that weight class. If your truck is older or lighter, this isn’t the test you need.
San Dimas is a hub for freight and logistics, which means a lot of trucks passing through here are subject to semi-annual testing. That’s twice a year, every year, starting in 2025. Miss a deadline, and you’re looking at registration holds, fines, and potential roadside enforcement. CARB uses remote emissions monitoring devices and automated license plate readers throughout California, so they’re not just relying on you to self-report.
When you come in for CARB diesel compliance testing, you’re getting a test that’s recognized by the state, submitted directly to CARB’s system, and tied to your VIN and compliance schedule. It’s not something you can skip or delay. And because heavy-duty vehicles make up just 3% of California’s vehicles but produce over half the smog-causing pollution, the state is serious about enforcement.
We’re here to make sure you meet the requirement without wasting time or money. You get tested, you get your results, and you move on.
Yes. If your truck operates in California and meets the criteria—model year 2013 or newer with a GVWR over 14,000 pounds—you’re required to comply with CARB emissions testing, even if it’s registered in another state.
CARB doesn’t care where your plates are from. If you’re driving on California roads, you’re subject to California regulations. That includes owner-operators based out of state, interstate freight haulers, and anyone running routes through the state on a regular basis.
The enforcement is real. CARB coordinates with California Highway Patrol and uses automated license plate readers to identify non-compliant vehicles. If your truck gets flagged, you could face fines, registration holds, or roadside citations. Getting tested in San Dimas before that happens is a lot easier than dealing with enforcement after the fact.
It depends on your vehicle and your compliance schedule. Some trucks are subject to annual testing, while others require semi-annual testing—that’s twice a year. CARB assigns your compliance deadlines based on your vehicle’s registration and weight class.
If you’re on a semi-annual schedule, you’ll have two compliance deadlines each calendar year starting in 2025. Miss one, and you’ve got 30 days to submit a passing test after receiving a Notice to Submit to Testing. Miss that window, and you’re facing penalties and registration blocks.
You can submit your test results up to 90 days before your deadline, so there’s flexibility to plan ahead. If you’re not sure what your schedule is, bring your truck in and we can help you figure out when you need to test and how often.
If your truck fails, you’ll need to address whatever caused the failure—usually that means repairs—and then come back for a retest. The failure documentation will show what part of the emissions test didn’t meet CARB standards, so you’re not guessing about what needs to be fixed.
You’ll want to work with a mechanic who understands heavy-duty diesel systems and CARB compliance. Once the repairs are done, you can retest. If it passes the second time, that passing result gets submitted to CARB and satisfies your compliance requirement.
The key is not to ignore a failure. CARB gives you a limited window to get compliant after a failed test, and if you don’t act, you’re looking at registration holds and fines. Get it fixed, get it retested, and get back on the road.
The cost of CARB emissions testing varies depending on the facility and the specific services included. There’s also an annual Clean Truck Check fee that CARB collects, which is $31.18 as of 2024.
What you’re paying for is the test itself, the credentialed tester’s time, the equipment required to run a compliant emissions test, and the submission of your results to CARB’s system. It’s not the same as a standard smog check—this is heavy-duty vehicle compliance testing with specific regulatory requirements.
When you’re comparing costs, keep in mind what non-compliance costs. Fines can hit $10,000 per vehicle per day. Downtime from a registration block can cost you $300 to $900 per day in lost productivity. Testing is cheap compared to the alternative.
Clean Truck Check testing has to be done by a CARB credentialed tester at a facility that’s set up to handle heavy-duty vehicle compliance. Not every smog check station can do it—this requires specific training, certification, and equipment.
The tester has to have completed CARB’s online Tester Training Course and scored at least 80% on the exam. The facility has to have the right tools to test vehicles over 14,000 pounds GVWR. And the results have to be submitted directly to CARB’s system to count toward your compliance deadline.
We meet those requirements here in San Dimas. We’re set up specifically to handle CARB HD I/M testing for 2013 and newer trucks. If you’re in the area and need testing done, you’re in the right place.
The penalties are steep. CARB can fine you up to $10,000 per vehicle per day for non-compliance. On top of that, you’re looking at DMV registration blocks, which means you can’t renew your registration until you submit a passing test.
If you’re caught operating a non-compliant vehicle, California Highway Patrol can issue citations during roadside inspections. CARB also uses remote emissions monitoring devices and automated license plate readers throughout the state, so enforcement isn’t just random—it’s systematic.
The financial hit from fines and downtime adds up fast. Testing costs a fraction of what you’d pay in penalties, and it keeps your truck legal and on the road. If you’ve got a compliance deadline coming up, don’t wait. Get tested early and avoid the risk.
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