Hear from Our Customers
You’re not dealing with DMV registration blocks that keep your trucks off the road. You’re not scrambling to find a CARB credentialed tester when you get a Notice to Submit within 30 days. You’re not facing fines that start at $10,000 per vehicle per day.
Your fleet stays operational. Your compliance deadlines are met before they become emergencies. Your business runs without the constant stress of wondering if you’re going to get flagged at a roadside check.
That’s what compliance actually looks like. Not perfect, not glamorous, but your trucks are legal, your registration is clear, and you’re focused on running your business instead of putting out regulatory fires.
We serve the Lynwood trucking community with CARB credentialed Clean Truck Check testing. We’re not new to diesel compliance or heavy-duty vehicle regulations.
Lynwood has over 860 carriers operating in the area. That means a lot of semi trucks, construction vehicles, and commercial fleets that need to meet California’s HD I/M testing requirements. We understand the pressure you’re under because we work with fleet operators and owner-operators every day who are navigating the same CARB regulations.
We’re here because this service matters. The penalties are real, the deadlines are tight, and you need someone who knows what they’re doing.
You bring your 2013 or newer heavy-duty truck to our Lynwood location. We verify your vehicle qualifies under CARB’s Clean Truck Check program—that means GVWR over 14,000 pounds and the right model year.
Our CARB credentialed tester performs the emissions compliance test. This isn’t a standard smog check. It’s specific HD I/M testing that CARB requires for heavy-duty diesel vehicles. The test checks your truck’s emissions systems to make sure everything meets California’s standards.
Once you pass, we submit your results directly to CARB. You can submit a passing test up to 90 days before your compliance deadline, which gives you time to handle repairs if needed. Most vehicles need testing every six months, so you’ll have recurring deadlines to track.
If your truck doesn’t pass, we’ll tell you what’s wrong. You get it fixed, come back, and retest. No surprises, no runaround.
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You’re getting CARB HD I/M testing from a credentialed tester who’s completed the state-required training. That’s not optional—CARB only accepts results from testers who’ve passed their certification exam and maintain current credentials.
You’re getting your results submitted to CARB’s system so your compliance deadline is satisfied. That keeps the DMV from blocking your registration and keeps enforcement off your back.
In Lynwood and the greater Los Angeles area, the trucking industry is massive. Construction projects, port traffic, freight hauling—all of it depends on heavy-duty vehicles staying compliant. California’s regulations became effective October 1, 2024, and all compliance deadlines from January 1, 2025 forward require passing emissions tests. This isn’t going away.
The annual compliance fee went up to $31.18 per vehicle in 2025. That’s on top of testing costs. But compare that to a $10,000 per day fine or losing your ability to register your truck, and the math is pretty clear.
Yes. If your heavy-duty truck operates in California, you need to comply with CARB’s Clean Truck Check requirements regardless of where it’s registered.
Out-of-state trucks aren’t exempt. CARB’s regulations apply to any vehicle with a GVWR over 14,000 pounds, model year 2013 or newer, that operates on California roads. That includes trucks registered in Nevada, Arizona, Oregon, or anywhere else.
If you’re an out-of-state operator running routes through California, you’re subject to the same compliance deadlines and penalties as California-registered vehicles. Roadside enforcement doesn’t care about your license plate state—they care whether you’re compliant with California emissions standards.
You face enforcement action. That starts with fines up to $10,000 per vehicle per day and can include DMV registration blocks that prevent you from renewing your registration.
CARB doesn’t mess around with compliance deadlines. If your truck is flagged and you don’t submit a passing test within the required timeframe, penalties start accumulating fast. For a small fleet or an owner-operator, that kind of fine can be financially devastating.
The DMV registration hold is just as bad. You can’t legally operate your truck without current registration, which means your vehicle is off the road and you’re losing income. Getting back into compliance after you’ve already missed the deadline is harder and more expensive than just staying on top of it in the first place.
Most heavy-duty vehicles need testing every six months. CARB assigns compliance deadlines on a semi-annual basis, so you’ll have recurring deadlines to track.
Your specific compliance schedule depends on your vehicle and when you first entered the program. CARB sends notices, but it’s your responsibility to make sure you’re tested and compliant before each deadline. Missing one creates problems that cascade into registration issues and penalties.
The good news is you can submit a passing test up to 90 days before your deadline. That gives you a buffer if your truck needs repairs to pass. If you fail the first test, you have time to fix the issues and retest before your deadline hits.
Then you don’t need Clean Truck Check testing. CARB’s HD I/M program only applies to heavy-duty vehicles that are model year 2013 or newer with a GVWR over 14,000 pounds.
If your truck is a 2012 or older, you’re not subject to these requirements. If your vehicle’s GVWR is under 14,000 pounds, same thing—this program doesn’t apply to you. CARB set those thresholds specifically, and they’re not flexible.
That said, older and lighter vehicles may still need standard smog checks depending on their classification. But Clean Truck Check is a separate program with its own rules. If your truck doesn’t meet both criteria—2013+ and over 14,000 pounds GVWR—you’re not in this program.
It has to be a CARB credentialed tester. CARB only accepts results from testers who’ve completed their official training program and hold current credentials.
This isn’t like a regular smog check where any licensed station can do the work. Clean Truck Check testing requires specialized certification. Testers have to pass CARB’s online training course with at least an 80% score, and those credentials need to be renewed every two years.
If you go to someone who’s not credentialed, your test results won’t be accepted by CARB. That means you’ve wasted time and money, and you’re still not compliant. Always verify that your tester is CARB credentialed before you schedule your appointment. We have credentialed testers on staff who meet CARB’s requirements.
You get a Notice to Submit to Testing, and you have 30 days to provide a passing Clean Truck Check test or face enforcement action.
CARB uses roadside emissions monitoring to flag vehicles that may not be compliant. If your truck gets flagged, you’re not arrested or fined on the spot, but you’re on a tight timeline. Thirty days isn’t much time if you need repairs or if you’re scrambling to find a credentialed tester.
If you don’t submit a passing test within that 30-day window, enforcement escalates. That’s when the fines and registration blocks kick in. The best approach is to stay ahead of your compliance deadlines so you’re never in a position where a roadside check becomes a crisis.
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