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You’re running a tight operation. The last thing you need is a truck sitting idle because California changed the rules again or because someone uploaded bad data to CARB.
Starting January 1, 2025, every compliance deadline requires a passing Clean Truck Check test. That’s not optional. And if your truck gets flagged as a potential high emitter, you’ve got 30 days to submit a passing test or face a registration hold that pulls your vehicle off the road.
We handle CARB emissions testing for 2013 and newer diesel trucks over 14,000 pounds GVWR. That’s the OBD-equipped fleet that needs specialized scanning with CARB-certified devices. We’re credentialed testers, which means we’ve passed CARB’s training and exam, we use the right equipment, and we submit results directly to the state. You get a clean test, your compliance is logged, and your truck keeps moving.
We serve the South Bay trucking community with CARB-credentialed Clean Truck Check testing right here in Hermosa Beach. We’re not just uploading scan data and hoping it clears. We know what CARB looks for, and we know what causes trucks to fail before the test even starts.
Hermosa Beach puts you close to the ports, close to major freight corridors, and close to the kind of enforcement scrutiny that comes with operating in coastal California. That means your compliance can’t be an afterthought. We’ve built our testing process around getting it right the first time so you’re not scrambling to fix issues on a deadline.
We’re local, we’re credentialed, and we’re here when you need a test done without the runaround.
First, we verify your truck qualifies. That means confirming it’s model year 2013 or newer with a GVWR over 14,000 pounds. If it doesn’t meet both criteria, this test doesn’t apply.
Next, we connect CARB-certified OBD testing equipment to your truck’s diagnostic port and pull the engine data. We’re looking at emissions readiness monitors, fault codes, and whether your system is operating within California’s limits. This isn’t a visual inspection. It’s a data scan that CARB reviews for compliance.
If your truck passes, we submit the results directly to CARB’s database. You’ll see the passing test in your vehicle owner account, and your compliance deadline is satisfied. If something flags, we’ll walk you through what needs attention and how much time you have to address it before your next test. You can submit a passing test up to 90 days before your deadline, which gives you a buffer if repairs are needed.
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California’s Heavy-Duty Inspection and Maintenance Program isn’t new, but the enforcement is tightening. As of October 1, 2024, the Clean Truck Check requirement is live. Every compliance deadline from January 1, 2025 forward requires a passing test. Starting in 2025, you’ll need testing twice per year. By October 2027, OBD-equipped trucks will need testing four times per year.
Here in Hermosa Beach and across the South Bay, that means roughly 1 million heavy-duty trucks and buses operating in California are now subject to this program. It covers commercial fleets, private owners, government vehicles, and out-of-state trucks operating here. If you’re over 14,000 pounds and running a 2013 or newer diesel engine, you’re in scope.
Non-compliance triggers DMV registration holds. That’s not a fine you pay and move on. That’s your truck sitting until you fix the issue and pass a test. CARB can also issue enforcement notices if your vehicle is flagged as a high emitter, even if you passed your last test. You’ll have 30 days to retest and clear it. The annual compliance fee is $31.18 per vehicle for 2025, and it increases every year. Miss the deadline, and you’re looking at penalties on top of the registration block.
Yes, if you operate in California. The Clean Truck Check requirement applies to all heavy-duty trucks operating in the state, regardless of where they’re registered.
That includes trucks based in Nevada, Arizona, Oregon, or anywhere else that cross into California for deliveries, pickups, or transit. CARB’s enforcement doesn’t stop at state lines. If your truck is on California roads and meets the criteria (2013 or newer, over 14,000 pounds GVWR), you’re required to comply with the same testing deadlines as California-registered vehicles.
Out-of-state operators get caught off guard by this all the time. You might pass emissions in your home state, but California’s standards are different, and CARB wants proof your truck meets their limits. If you’re running regular routes into the South Bay or through Southern California, it’s worth getting tested here before you get flagged.
You can submit a passing test up to 90 days before your compliance deadline. That’s a built-in buffer that CARB allows so you have time to make repairs if something comes up.
Here’s why that matters. If you wait until the week before your deadline and your truck fails, you’re now racing the clock to fix the issue, retest, and get the results submitted before your registration gets blocked. That’s stressful and expensive.
Testing early gives you options. If everything clears, you’re done and compliant. If something flags, you’ve got three months to address it without your truck sitting idle. We recommend scheduling your test at least 60 days out if you’re coming up on a deadline. That way, if repairs are needed, you’re not scrambling.
You’ll get a 30-day notice to repair the issue and retest. During that time, your truck can still operate, but if you don’t pass a retest within 30 days, CARB can suspend your registration.
A failed test usually means there’s a fault code, an emissions system malfunction, or readiness monitors that aren’t set. Sometimes it’s a sensor. Sometimes it’s a bigger issue with your diesel particulate filter or exhaust system. We’ll walk you through what flagged and what needs attention.
Once repairs are made, you’ll need to bring the truck back for another test. If it passes, we submit the results to CARB and your compliance is satisfied. If it fails again, you’re looking at more diagnostics and potentially more downtime. That’s why pre-test inspections matter. Catching issues before the official test saves you time and keeps your truck on the road.
Yes. The Clean Truck Check is a separate requirement from standard smog testing, and it applies specifically to heavy-duty trucks over 14,000 pounds GVWR with 2013 or newer diesel engines.
A regular smog check covers light-duty vehicles and uses different testing protocols. The Clean Truck Check is part of CARB’s Heavy-Duty Inspection and Maintenance Program, which focuses on OBD-equipped commercial vehicles. It requires credentialed testers, CARB-certified scanning equipment, and direct reporting to the state’s HD I/M database.
Even if your truck passed another emissions test recently, that doesn’t satisfy your Clean Truck Check compliance deadline. CARB tracks these separately, and your registration hold will trigger if you miss the HD I/M requirement, regardless of other tests you’ve completed. If you’re unsure whether your truck needs this test, bring in your registration and we’ll confirm.
Pricing varies depending on the truck and what’s involved, but most Clean Truck Check tests in the South Bay run between $150 and $300. That covers the OBD scan, data submission to CARB, and the credentialed tester’s time.
If your truck needs a pre-test inspection or diagnostics to identify potential issues before the official test, that’s additional. Some operators prefer that route because it reduces the chance of a failed test and the 30-day repair notice that comes with it.
Keep in mind, the cost of the test is small compared to what you’ll lose if your truck gets hit with a registration hold. One day of downtime can cost you more than a year’s worth of testing. And if you’re facing CARB fines for non-compliance, those start at hundreds of dollars per violation and can climb fast. We’d rather see you spend a couple hundred on a clean test than thousands on penalties and lost revenue.
It has to be a credentialed Clean Truck Check tester. Regular smog shops aren’t authorized to perform this test, and if you go to one, the results won’t be accepted by CARB.
Credentialed testers have completed CARB’s online training course, passed the exam with at least 80 percent, and are listed in the state’s official database. We use CARB-certified OBD testing devices, and we’re responsible for submitting your results directly to the Heavy-Duty Inspection and Maintenance system. Non-certified equipment or testers will result in an unsuccessful test, even if your truck’s emissions are fine.
CARB publishes a list of available-for-hire credentialed testers, and we’re on it. If you’re shopping around, make sure whoever you’re talking to is actually credentialed. A lot of shops offer diesel services or heavy-duty inspections, but that doesn’t mean they’re authorized to perform the Clean Truck Check. Ask to see their certificate or check CARB’s tester list before you schedule.
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