Clean Truck Check Los Angeles & Riverside County, CA

Keep Your 2013+ Semi Truck Road-Legal

Digital OBD emissions testing for heavy-duty trucks in LA and Riverside Counties. We handle CARB compliance so you avoid registration holds and keep earning. Our mobile service takes care of everything!

CARB Credentialed Testers Only

Our testers completed California Air Resources Board training and certification. Every test meets current HD I/M regulations for accurate, state-approved results.

Direct CARB System Submission

We submit your OBD test results electronically to the CTC-VIS database the same day. No paperwork for you—just compliance confirmation.

Certified OBD Testing Equipment

We focus exclusively on digital emissions testing for newer heavy-duty vehicles with on-board diagnostics systems—no guesswork, just data.

CARB HD I/M Testing Los Angeles & Riverside County, CA

Why Your 2013+ Truck Needs This Test

If you run a semi truck with a model year 2013 or newer engine and a gross vehicle weight rating over 14,000 pounds in California, you’re required to pass Clean Truck Check emissions testing. This is California’s Heavy-Duty Inspection and Maintenance program, and it’s not optional. The test itself is straightforward. SMOG Motors connects to your truck’s on-board diagnostic system, download emissions data from the ECU, and submit it directly to the State of California through the CARB compliance database. The whole process takes about 15 to 30 minutes if your truck’s systems are functioning properly. What matters is that you stay ahead of your deadlines. California-registered trucks follow your DMV renewal date. Out-of-state trucks follow a schedule based on the last digit of your VIN. Either way, you need a passing test submitted every six months—and you can submit up to 90 days early.

Clean Truck Check

Need a quick estimate?

Stay compliant and keep your trucks on the road with All Smog Motors. We specialize in CARB emissions compliance checks for heavy-duty trucks, making the process simple, fast, and stress-free. Whether you’re up against a registration deadline or received a notice to test, our certified team will handle your inspection accurately and efficiently so you can avoid penalties and costly downtime. Fill out the form below to schedule your compliance check today and keep your fleet moving without interruption.

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Heavy-Duty Vehicle Compliance Los Angeles

What Passing This Test Does for You

This isn't about checking a box. It's about keeping your truck legal, your registration active, and your business moving without interruption from the state.

You avoid DMV registration holds that can sideline your truck for weeks while you scramble to fix compliance issues and lost revenue piles up.

You dodge fines that start at $1,000 per vehicle per day and can reach $10,000 depending on how long you’ve been non-compliant.

Your compliance certificate gets processed and shows up in your CARB account within 1-2 business days so you can renew registration immediately.

You stay off CARB’s radar for roadside enforcement stops and remote emissions monitoring that flags high-emitting vehicles for mandatory retesting.

You get state-issued documentation proving your truck meets California emissions standards if you’re ever pulled over or inspected on the road.

You can schedule your testing up to 90 days before your deadline, so it fits your route schedule instead of forcing an emergency appointment.

CARB Diesel Compliance in Los Angeles & Riverside County, CA

This Service Is for Specific Trucks Only

Semi Truck Smog Check in California

How the OBD Testing Process Actually Works

When you bring your truck in for Clean Truck Check testing, we’re not guessing or eyeballing anything. We’re pulling hard data directly from your truck’s computer. The OBD system in your truck constantly monitors emissions control components—things like your diesel particulate filter, selective catalytic reduction system, and exhaust gas recirculation valve. It tracks faults, stores diagnostic trouble codes, and records whether those systems are operating within acceptable parameters. We connect a CARB-certified OBD scan tool to your truck’s diagnostic port and download that data. The scan checks for active malfunction indicator lights, diagnostic trouble codes, permanent diagnostic trouble codes, and readiness monitors. If your MIL is on, you fail. If you have active or permanent trouble codes related to emissions, you fail. If your readiness monitors show “not ready” because someone recently cleared codes, you fail. Passing means your emissions systems are working as designed. Once we confirm a pass, we submit the results electronically to CARB’s CTC-VIS database. CARB processes it, updates your compliance status, and makes your certificate available in your account. You don’t have to mail anything, upload anything, or follow up with the state. We handle the submission, and you get confirmation that you’re good for the next six months. If your truck fails, we’ll tell you why. You’ll need to get the underlying problem repaired—whether that’s a sensor, a filter, or something more involved—and then retest before your deadline. The state gives you a 90-day window before your deadline to submit a passing test, so use that buffer. Don’t wait until the last week and find out your truck needs $3,000 in repairs.

Frequently Asked Questions

What trucks qualify for Clean Truck Check emissions testing?

Your truck qualifies if it’s model year 2013 or newer and has a gross vehicle weight rating over 14,000 pounds. This applies to diesel and alternative fuel commercial trucks operating in California, whether you’re registered in-state or out-of-state. Older trucks require different testing methods. The service we provide is specifically for 2013 and newer trucks with OBD systems—not older models or lighter vehicles. Check the emissions control label on your engine if you’re unsure, or reach out with your VIN.

How long does a Clean Truck Check inspection take?

Most inspections take 10 to 15 minutes per truck. The process involves downloading data from your truck’s ECU and submitting it to the State of California. Because it’s a digital scan rather than a physical smoke test, it’s fast. For multiple trucks, we can handle 15 to 40 per day depending on your fleet size and location. The goal is keeping your trucks working, not sitting idle.

Can you come to my truck yard or job site for testing?

Yes. Mobile service is what we do. We travel across Los Angeles County and Riverside County to perform inspections at truck stops, yards, job sites, or wherever your trucks are parked. You don’t need to take trucks out of operation or drive to a facility. We bring certified equipment to you, complete the inspection on-site, and submit results directly to CARB. It works around your schedule and operation.

How often do I need to get my truck tested?

Right now, most commercial trucks need testing twice per year. Your specific deadlines depend on your registration date if you’re California-registered, or the last digit of your VIN if you’re out-of-state or exempt from DMV registration. Starting in October 2027, trucks with OBD systems will need testing four times per year. You can submit passing results up to 90 days before your deadline, so planning ahead helps avoid last-minute stress.

What happens if my truck fails the emissions inspection?

If your truck doesn’t pass, you’ll need emissions system repairs and then a retest before your compliance deadline. The test results show what triggered the failure, usually fault codes or OBD readiness issues. We focus strictly on inspections, not repairs, but the data we provide helps your mechanic know exactly what needs attention. Once repairs are done, we can retest to get you compliant.

Are you certified to perform these inspections?

Yes. We’re a Certified Credential Tester, which is the legal requirement to perform Clean Truck Check emissions inspections in California. That means we’ve completed CARB’s official training, passed the exam, and are authorized to download ECU data and submit results to the state. Not all emissions testers are certified for this program, so working with a credentialed tester ensures your results are valid and accepted by CARB and the DMV.

Will this inspection clear my DMV registration hold?

If your registration is blocked due to Clean Truck Check non-compliance, a passing inspection should clear it. Once we submit your passing test results to CARB, it typically takes about three business days for the DMV to process and update your vehicle’s compliance status. If you’re facing a registration hold, reach out so we can get you tested and back on the road quickly.

Do out-of-state trucks need California Clean Truck Check compliance?

Yes. Any commercial truck over 14,000 pounds that operates on California roads must comply, regardless of where it’s registered. If you’re an out-of-state operator hauling into California, you’re required to register in the CTC-VIS system, pay the annual compliance fee, and pass emissions testing on the same schedule as California trucks. Compliance deadlines for out-of-state trucks are based on the last digit of your VIN.

What's the difference between this and a regular smog check?

Regular smog checks are for passenger vehicles. Clean Truck Check is California’s heavy-duty emissions program for commercial trucks over 14,000 pounds. For trucks with 2013 or newer engines, it involves scanning the onboard diagnostics system using CARB-certified equipment and submitting that data to the state. It’s faster than traditional smoke tests and focuses on ensuring your emissions control systems work properly throughout the truck’s life.