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You’re not dealing with a DMV registration hold. Your trucks aren’t sitting idle while you scramble to find a credentialed tester. You’re not staring down fines that can hit $10,000 per vehicle per day.
California’s Heavy-Duty Inspection and Maintenance program isn’t optional anymore. If you operate a diesel or alternative fuel truck that’s model year 2013 or newer with a gross vehicle weight rating over 14,000 pounds, you need a passing Clean Truck Check to stay legal. The compliance deadlines are real, and the consequences for missing them aren’t just paperwork—they’re operational shutdowns and serious financial penalties.
When you stay ahead of CARB diesel compliance requirements, your fleet keeps moving. You avoid the chaos of last-minute testing, the risk of failed inspections, and the nightmare of trucks that can’t be registered. You get a certificate that proves your vehicle meets California CARB compliant standards, and you move on with your day.
We serve Pico Rivera and the surrounding communities where trucking isn’t just an industry—it’s how people make a living. We’re minutes from the Port of Long Beach and Port of Los Angeles, the busiest container ports in the country. We see the trucks that move freight every single day.
We’re CARB credentialed to perform Heavy-Duty Inspection and Maintenance testing, which means we’re authorized to conduct the compliance tests California now requires. We understand the regulations, the deadlines, and what’s at stake when your registration is on the line.
You’re not getting a generic smog shop trying to figure out heavy-duty vehicle compliance on the fly. You’re working with a team that knows the difference between a passing test and a truck that’s about to cost you time and money.
You bring in your 2013 or newer heavy-duty truck with a GVWR over 14,000 pounds. We connect to your vehicle’s onboard diagnostics system and run the CARB-required compliance test using state-validated equipment. This isn’t a visual inspection or a quick look under the hood—it’s a data-driven emissions compliance check that meets California’s HD I/M program standards.
If your truck passes, you get a certificate of compliance that you’ll submit to meet your deadline. That certificate keeps your registration active and your vehicle legal to operate in California. If there’s an issue, we’ll tell you exactly what failed and what needs to be addressed before you can retest.
The testing itself doesn’t take all day, but you do need to plan ahead. You can submit a passing test up to 90 days before your compliance deadline, which gives you time to handle any repairs if something comes up. Waiting until the last minute is how trucks end up stuck at the DMV with registration problems.
This is semi-annual testing for most vehicles, meaning you’ll need to do this twice a year. Starting in October 2027, OBD-equipped vehicles will require testing four times per year. The requirements aren’t getting lighter—they’re getting stricter.
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California’s Clean Truck Check program applies to nearly all diesel and alternative fuel heavy-duty vehicles with a GVWR over 14,000 pounds that operate in the state. That includes semi trucks, buses, commercial vehicles, privately-owned trucks, government vehicles, and even vehicles registered outside California if they’re operating here. The key qualifier: model year 2013 or newer.
Heavy-duty trucks make up only 3% of vehicles on California roads, but they’re responsible for over half of the smog-causing pollution and fine particulate matter. That’s why CARB implemented this program—and why enforcement is serious. Non-compliance can result in DMV registration blocks, daily fines, and operational restrictions that can shut down your business.
In Pico Rivera, where the trucking industry is a major part of the local economy, staying compliant isn’t just about following rules. It’s about protecting your ability to work. The ports are busy, freight demand is high, and competition is real. You can’t afford to have trucks sitting idle because of a compliance issue that could’ve been handled ahead of time.
Your compliance deadline is based on your vehicle’s VIN number, and you’re required to pay an annual compliance fee—$31.18 per vehicle as of 2025. Testing must be performed by a CARB credentialed tester, which limits where you can go. Not every smog shop is authorized to perform CARB HD I/M testing, so finding a credentialed location matters.
The Clean Truck Check requirement applies to diesel and alternative fuel heavy-duty vehicles with a gross vehicle weight rating over 14,000 pounds that are model year 2013 or newer. This includes semi trucks, buses, commercial trucks, privately-owned heavy-duty vehicles, government vehicles, and trucks registered outside California that operate in the state.
If your truck is older than 2013 or has a GVWR of 14,000 pounds or less, this program doesn’t apply to you. The testing is specifically targeted at newer heavy-duty vehicles because they’re equipped with onboard diagnostics systems that allow for emissions monitoring.
Hybrid trucks and buses are also included in the program. The key factors are the model year, the weight rating, and whether the vehicle operates in California. If you’re not sure whether your truck qualifies, check your VIN and registration details—your compliance deadline is tied to your VIN number.
Most heavy-duty vehicles subject to the Clean Truck Check program require semi-annual testing, meaning twice per year. Your specific compliance deadlines are based on your vehicle’s VIN number, and you’ll receive notices from CARB about when your tests are due.
Starting in October 2027, vehicles equipped with onboard diagnostics systems will be required to test four times per year. The program is phasing in more frequent testing as the technology and infrastructure develop, so expect the requirements to increase over time.
You can submit a passing compliance test up to 90 days before your deadline, which gives you a buffer if your truck needs repairs. Waiting until the last minute is risky—if your vehicle fails, you’ll need time to fix the issue and retest before your deadline passes. Missing a deadline can result in DMV registration holds and fines, so plan ahead.
If your truck fails the compliance test, you’ll need to address whatever issue caused the failure and then retest. The test results will show you exactly what didn’t pass, whether it’s an emissions system problem, a diagnostic code, or another compliance issue.
You’re responsible for getting the necessary repairs done at a qualified repair facility. Once the repairs are complete, you’ll bring your truck back for another Clean Truck Check. You can submit a passing test up to 90 days before your compliance deadline, so if you test early and fail, you have time to fix the problem without missing your deadline.
If you don’t submit a passing test by your compliance deadline, you risk DMV registration holds and enforcement action. CARB can block your vehicle registration, which means you won’t be able to renew your plates or legally operate the truck in California. Fines for non-compliance can reach up to $10,000 per vehicle per day, so this isn’t something you want to ignore or delay.
Clean Truck Check testing must be performed by a CARB credentialed tester, which means not every smog shop or repair facility is authorized to do it. We’re CARB certified to perform Heavy-Duty Inspection and Maintenance testing for trucks that meet the program requirements.
We’re located minutes from the Port of Long Beach and Port of Los Angeles, making us a convenient option for owner-operators and fleets working in the area. Our team is trained on the specific CARB HD I/M testing procedures and uses state-validated equipment to ensure accurate results.
When you’re looking for a testing location, make sure they’re actually credentialed by CARB to perform heavy-duty emissions testing. A standard smog check for passenger vehicles is not the same as a Clean Truck Check for heavy-duty trucks. The equipment, procedures, and certification requirements are different, and going to a non-credentialed location will waste your time.
Testing costs vary by location, but you should also factor in the annual compliance fee that CARB charges—$31.18 per vehicle as of 2025. That fee is separate from the actual testing cost and is required to participate in the program.
The testing process itself typically takes less than an hour, depending on the vehicle and whether there are any issues with connecting to the onboard diagnostics system. It’s not an all-day process, but you should plan to be without your truck for at least a short period while the test is conducted.
If your truck passes, you’ll receive a certificate of compliance that you’ll need to submit to CARB to meet your deadline. If it fails, you’ll need to schedule repairs and a retest, which adds time and cost. Testing early—up to 90 days before your deadline—gives you room to handle any problems without the pressure of an immediate deadline.
No. If your truck is subject to the Clean Truck Check program and you don’t have a passing compliance test on file by your deadline, you’re operating illegally. CARB can block your DMV registration, which means you won’t be able to renew your plates or keep your truck on the road.
Enforcement is real. Non-compliance can result in fines up to $10,000 per vehicle per day, plus the operational impact of having your registration held. If you’re an owner-operator or run a small fleet, that kind of penalty can be devastating.
The program went into effect October 1, 2024, and all compliance deadlines of January 1, 2025 or later require a passing test. This isn’t a suggestion or a phase-in period anymore—it’s mandatory. If you operate a 2013 or newer heavy-duty truck over 14,000 GVWR in California, you need to be compliant. Ignoring it won’t make it go away, and the consequences aren’t worth the risk.
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