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You avoid fines that start at $1,000 per vehicle per day and can climb to $10,000. You keep your trucks registered with the DMV without holds or database removals. You maintain your ability to operate in California, whether you’re based here or just passing through.
Clean Truck Check testing became mandatory in 2024, and every heavy-duty diesel truck model year 2013 or newer with a GVWR over 14,000 pounds needs to submit passing results twice a year. Miss a deadline and you’re looking at 30-day notices, roadside flags, and compliance letters that shut down operations fast.
The good news is you can submit passing tests up to 90 days before your deadline. That means you control the schedule instead of scrambling last minute. You get a compliance certificate, electronic upload to CARB’s CTC-VIS system, and proof that your fleet is clear.
We handle CARB compliance testing for the exact trucks that need it—2013 and newer models over 14,000 pounds GVWR. We don’t test older trucks or lighter vehicles because those require different equipment and different processes. We stay in our lane so you get accurate results the first time.
Our testers are CARB credentialed, and we use only certified OBD testing equipment that meets California’s requirements for diesel engines. We’re located in West Covina, right in the heart of the Los Angeles County trucking corridor, where thousands of heavy-duty vehicles move through daily.
You’re not getting a general smog shop trying to figure out Clean Truck Check rules. You’re working with a facility that knows the 2013+ OBD requirements, understands the CTC-VIS database, and handles the electronic submission process correctly.
You bring your truck to our West Covina location with your VIN and registration information. We verify that your vehicle qualifies—model year 2013 or newer, GVWR over 14,000 pounds—because those are the only trucks we test under the Clean Truck Check program.
We connect certified OBD testing equipment to your truck’s diagnostic system. This isn’t a smoke opacity test. For 2013 and newer diesel engines, CARB requires onboard diagnostics testing that checks your emissions control systems electronically. The test takes about 30 minutes depending on your truck’s readiness monitors.
If your truck passes, we electronically transmit the results directly to CARB’s CTC-VIS system and provide you with a compliance certificate and record copy. You’re done. If something fails, we’ll tell you exactly what triggered it so you know what needs repair before retesting. Either way, you leave knowing where you stand.
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This is compliance testing for California’s Clean Truck Check program, which applies to all heavy-duty trucks operating in the state. You need this if you’re a fleet operator, owner-operator, interstate trucker, or any commercial vehicle owner running 2013+ model year trucks over 14,000 pounds GVWR.
West Covina sits at a major intersection of freight routes through Los Angeles County. If your trucks travel the I-10 corridor or service the San Gabriel Valley, you’re in CARB’s enforcement zone. Roadside monitoring devices flag smoking trucks automatically, and you’ll get a 30-day notice to submit testing. That’s not a suggestion—it’s a compliance order.
Testing frequency is twice a year right now, based on your DMV registration date or VIN number. By 2027, that increases to four times annually. You can submit passing results up to 90 days early, which gives you flexibility to schedule around your operations instead of waiting until the deadline hits. The results upload immediately, so there’s no waiting period to confirm your compliance status.
If your truck is model year 2013 or newer and has a GVWR over 14,000 pounds, you need Clean Truck Check testing through the CTC-VIS system. This is different from standard smog checks. It uses OBD diagnostics instead of smoke opacity testing.
Older trucks or lighter vehicles follow different rules and use different testing methods. We only handle the 2013+ heavy-duty category because that’s what requires specialized CARB-certified OBD equipment and credentialed testers.
If you’re not sure which category your truck falls into, bring your registration and VIN. We can tell you immediately whether you need Clean Truck Check testing or if your vehicle requires a different type of compliance test.
Right now, you need to submit passing tests twice a year. Your specific deadlines depend on either your DMV registration date or your truck’s VIN number, depending on how CARB assigned your compliance schedule.
You can find your exact deadlines by checking the CTC-VIS database online using your VIN. If you’ve received a compliance letter from CARB, your deadline is listed there. Missing a deadline triggers a DMV registration hold and removes your truck from the compliance database.
The testing frequency increases over time. By 2027, you’ll need to submit four times per year. The good news is you can submit passing results up to 90 days before your deadline, so you can test early and avoid last-minute scheduling problems.
If your truck fails, we’ll give you a detailed report showing exactly what triggered the failure. Usually it’s an emissions control system issue that shows up through the OBD diagnostics—things like DPF problems, EGR faults, or sensor malfunctions.
You’ll need to get the issue repaired before you can retest and submit passing results to CARB. We don’t do repairs, but we can tell you what needs fixing so you can take it to your mechanic with specific information.
Once repairs are complete, you come back for retesting. If it passes, we submit the results electronically to CTC-VIS and you get your compliance certificate. The key is not to wait until your deadline to test, because if you fail, you need time to repair and retest before CARB starts enforcement action.
Yes. If you operate a heavy-duty truck in California—even if it’s registered out of state—you need to comply with Clean Truck Check requirements. That includes interstate truckers, out-of-state fleets, and anyone who drives through California regularly.
CARB doesn’t care where your truck is registered. If it operates on California roads and meets the criteria (2013+ model year, over 14,000 pounds GVWR), it needs testing. Roadside monitoring devices flag non-compliant trucks regardless of their license plates.
We test out-of-state vehicles the same way we test California-registered trucks. Bring your VIN and any CARB correspondence you’ve received. We’ll run the OBD test, and if you pass, we’ll submit the results to CTC-VIS so you’re clear to operate in California.
CARB fines start at $1,000 per vehicle per day for non-compliance and can reach $10,000 per vehicle per day for serious violations. If you’re running a fleet, those numbers multiply fast. A five-truck fleet that misses compliance deadlines could face $5,000 to $50,000 in daily fines.
Beyond fines, you’re looking at DMV registration holds that prevent you from renewing registration until you submit passing tests. Your trucks get removed from the compliance database, which means they’re flagged for enforcement at weigh stations and inspection points.
The cost of testing is a fraction of what you’d pay in fines and operational disruption. Most fleet operators treat this as a scheduled maintenance item now—test early, stay compliant, avoid the enforcement side of CARB entirely.
Yes. Every truck subject to Clean Truck Check requirements needs to be registered in CARB’s CTC-VIS database. If you haven’t registered yet, you need to do that before your first compliance deadline.
Registration is free and done online through CARB’s website. You’ll need your VIN, registration information, and basic truck details. Once you’re registered, the system assigns your compliance deadlines and tracks your test submissions.
If you’re not sure whether your trucks are registered, check the CTC-VIS system using your VIN. If they’re not in there and they meet the criteria (2013+ and over 14,000 pounds), you need to register them immediately. We can test your truck, but we can’t submit results to CARB unless your vehicle is already in their system.
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