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Your trucks stay on the road. That’s what matters.
When you’re compliant with California’s Clean Truck Check program, you avoid fines that start at $300 per violation and can hit $10,000 per vehicle per day. You keep your DMV registration active, which means no surprise holds that ground your fleet. You maintain access to ports and intermodal facilities where non-compliant trucks get turned away.
The testing itself takes 15 to 30 minutes. We use CARB-certified OBD devices that plug directly into your 2013 or newer diesel engine. Results go straight to the CARB database electronically. You get proof of compliance immediately, not days later.
Starting in 2025, most heavy-duty vehicles need testing every six months. If you operate in California or drive through it, this applies to you. Out-of-state trucks aren’t exempt. The moment your truck crosses into California, the clock starts on compliance requirements.
We serve one specific market: commercial trucks model year 2013 or newer with a GVWR over 14,000 pounds. We don’t test passenger cars. We don’t work on older trucks that fall under different regulations.
This focus matters because CARB compliance for modern heavy-duty vehicles is its own world. The rules changed. The equipment is specialized. The penalties are severe.
Glendale sits in the heart of LA’s commercial corridor, where thousands of semi trucks move freight daily. Fleet operators here face some of the strictest emissions enforcement in the country. We’re state-licensed and CARB-credentialed to handle the exact testing your trucks need to stay compliant with California Air Resources Board requirements.
You bring your 2013 or newer heavy-duty truck to our Glendale location. We verify the vehicle qualifies under Clean Truck Check requirements—over 14,000 lbs GVWR, correct model year, diesel engine with OBD capability.
We connect a CARB-certified OBD testing device to your truck’s diagnostic port. This device reads emissions data directly from your engine’s computer system. The test takes roughly 15 to 30 minutes depending on the vehicle. There’s no tailpipe sniffer. No dynamometer. The OBD system provides the emissions data CARB requires.
Once testing completes, results transmit electronically to CARB’s CTC-VIS database. You receive documentation showing your truck passed and is compliant. This record links to your VIN and updates your compliance status with the state immediately.
You’ll need to return every six months for most vehicles. Some 2013+ trucks will eventually require quarterly testing starting October 2027. We’ll let you know your specific schedule based on your truck’s year and configuration. You also need to pay the annual compliance fee of $31.18 directly to CARB, separate from the testing service.
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The service covers OBD emissions testing using state-certified equipment. We check that your truck’s emissions control systems are functioning properly and meeting California standards. We verify your vehicle information matches CARB records. We submit test results directly to the state database and provide you with compliance documentation.
This matters in Glendale because enforcement is active. CARB has been using roadside emissions monitoring devices since January 2023 to identify high emitters. If your truck gets flagged, you’re looking at mandatory testing, possible fines, and operational restrictions until you prove compliance.
Fleet operators in the LA area face additional pressure. High-priority fleets—those with 50 or more trucks or $50 million in annual revenue—get extra scrutiny. Even smaller operators and owner-operators can’t skip compliance. One non-compliant truck can trigger registration holds that ground your entire operation until you sort it out.
The testing requirement applies whether you’re based in California or just passing through. Out-of-state trucks operating in California must comply with the same Clean Truck Check rules as in-state vehicles. There’s no grace period. No exemptions for interstate commerce. Your truck enters California, it needs to be compliant.
Your truck qualifies if it’s model year 2013 or newer and has a gross vehicle weight rating over 14,000 pounds. This typically includes Class 7 and Class 8 semi trucks, heavy-duty box trucks, and other commercial vehicles in that weight class.
The key cutoff is 2013. That’s when diesel engines started coming with OBD systems capable of the emissions monitoring CARB requires. Older trucks fall under different testing programs that we don’t handle.
If your truck is lighter than 14,000 lbs GVWR, even if it’s a 2013 or newer model, it doesn’t qualify for Clean Truck Check. Those vehicles follow standard smog check rules. We specifically serve the heavy-duty segment because the equipment, certification, and compliance requirements are completely different.
Most heavy-duty vehicles need testing every six months as of 2025. The exact frequency depends on your truck’s model year and engine type.
Right now, 2013 and newer diesel trucks with OBD systems require semi-annual testing. CARB is phasing in quarterly testing for certain vehicles starting October 2027. The state will notify registered owners when their testing frequency changes.
You also need to pay an annual compliance fee to CARB, which is separate from the testing itself. That fee is currently $31.18 per year per vehicle. Missing either the testing deadline or the fee payment can trigger registration holds and penalties. The state tracks compliance electronically, so there’s no flying under the radar.
If your truck fails, you’ll need to get the emissions issue repaired and then retest. The test results will show which emissions control systems aren’t meeting standards, which helps your mechanic diagnose the problem.
Common failure points include malfunctioning diesel particulate filters, faulty NOx sensors, or issues with the selective catalytic reduction system. These are emissions control components that 2013+ diesel engines rely on to meet California standards.
Once repairs are complete, you return for another test. The vehicle must pass before CARB will update your compliance status. Until then, your truck is technically non-compliant, which can lead to registration holds and restricted access to certain facilities. The faster you address failures, the less disruption to your operations.
Yes. Any heavy-duty truck operating in California must comply with Clean Truck Check requirements, regardless of where it’s registered.
The rule applies the moment your truck enters the state. If you’re an out-of-state carrier running loads through California, your 2013+ trucks over 14,000 lbs need to be tested and compliant. CARB doesn’t exempt interstate commerce or give grace periods for non-California vehicles.
Enforcement happens at weigh stations, ports, and through roadside monitoring. Non-compliant out-of-state trucks can be restricted from operating until they pass testing. Some facilities, especially ports and intermodal yards, won’t let non-compliant trucks through the gate. If you run California routes regularly, staying on top of compliance testing prevents these disruptions.
The actual OBD testing takes about 15 to 30 minutes once we connect the device to your truck. Total time at our facility depends on whether there’s a wait and how quickly your truck’s systems communicate with the testing equipment.
This is significantly faster than traditional smog testing methods, which could take one to three hours and cost you $300 to $900 in downtime per vehicle. OBD testing is electronic and automated, pulling emissions data directly from your engine’s computer.
Plan for about 30 to 45 minutes total to be safe, especially if you’re bringing multiple trucks. We submit results to CARB electronically as soon as testing completes, so you’re not waiting days for compliance confirmation. You leave with documentation showing your truck passed and your compliance status is current.
Fines start at $300 per violation and can reach $10,000 per vehicle per day for serious or repeated non-compliance. CARB also places holds on vehicle registration, which prevents you from renewing your truck’s registration until you’re compliant.
Non-compliant trucks can be restricted from operating at ports, intermodal facilities, and certain commercial areas. Some facilities have their own compliance checks at the gate and will turn away trucks that don’t show current CARB certification.
Beyond fines, there’s the operational cost. A truck that can’t legally operate or access key facilities isn’t generating revenue. For fleet operators, one non-compliant vehicle can trigger audits of your entire fleet. The cost of staying compliant—testing every six months and maintaining your emissions systems—is minimal compared to the penalties and lost business from falling behind.
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