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Your trucks need to stay on the road. CARB’s Clean Truck Check program requires semi-annual emissions testing for heavy-duty vehicles, and if you miss your deadline or fail to comply, the consequences hit fast. Registration holds that prevent renewals. Fines up to $10,000 per vehicle per day. Access denied to ports and freight terminals.
You’re running a business, not studying regulatory code. That’s where we come in.
We handle CARB compliance testing for model year 2013 or newer trucks with a GVWR over 14,000 pounds. We come to you with mobile testing, or you can visit our station. Either way, you get credentialed testing, immediate results uploaded to CTC-VIS, and a clear path to staying compliant without pulling trucks off routes for days at a time. You can submit passing tests up to 90 days before your deadline, which gives you time to handle repairs if needed.
Starting January 1, 2025, California requires emissions testing twice a year for heavy-duty diesel trucks. That’s not a suggestion. It’s enforceable law, and CARB uses roadside monitoring and license plate readers to flag high-emitting vehicles. If your truck gets flagged, you have 30 days to submit a passing test or face enforcement action.
All SMOG Motors has served Stevenson Ranch and the Santa Clarita Valley for nearly 20 years. We’re CARB credentialed to perform Clean Truck Check and HD I/M inspections, which means we follow California’s diesel emissions testing rules using approved equipment and up-to-date systems.
Stevenson Ranch sits near major logistics corridors, and we know the trucking and fleet operators in this area don’t have time to waste. That’s why we offer mobile testing that meets you where your trucks are. Our team understands the regulations, the deadlines, and what it takes to keep your fleet compliant without disrupting operations.
We’re not here to upsell you or make this more complicated than it needs to be. You need a passing test, uploaded results, and proof of compliance. That’s what we do.
First, you schedule mobile testing at your location or bring your truck to our station in Stevenson Ranch. We work with your schedule because we know your trucks can’t sit idle.
When we arrive, we perform OBD-II emissions testing on your 2013 or newer diesel truck. This is a diagnostic scan that checks your truck’s onboard systems for emissions compliance. The test follows CARB’s exact protocols, and we use credentialed equipment that meets state requirements.
If your truck passes, we upload the results directly to CARB’s CTC-VIS system on the spot. You get immediate confirmation, and your compliance status updates in real time. If there’s an issue, we provide a clear diagnostic report so you know exactly what needs repair. You have a 90-day window before your deadline to retest after fixes, which keeps you ahead of enforcement.
You also need to register your vehicle in the CTC-VIS system and pay your annual compliance fee. We walk you through that process if you haven’t done it yet. Once you’re registered and your test results are uploaded, you’re compliant until your next testing cycle.
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You get mobile or in-station emissions testing performed by a CARB credentialed tester. That’s not just a title—it means we’re authorized to conduct official Clean Truck Check inspections that CARB recognizes and accepts.
We test diesel trucks and alternative fuel heavy-duty vehicles with a GVWR over 14,000 pounds, but only model year 2013 or newer. Older trucks fall outside our service scope. If your truck has OBD-II systems, we can test it. If it’s a 2012 or earlier model, you’ll need a different provider.
In Stevenson Ranch and surrounding areas like Valencia, Canyon Country, and Newhall, we see a lot of fleet operators managing multiple trucks. If that’s you, we can schedule testing for your entire fleet in one visit. You get all your trucks tested, results uploaded, and compliance documentation without coordinating multiple trips or losing days of productivity.
Starting in 2025, you’ll need testing twice a year. By 2027, OBD-equipped trucks will require testing four times annually. We’re already prepared for that shift, and we’ll make sure your fleet stays ahead of the requirements as they ramp up.
If your truck doesn’t pass, you get a diagnostic report that shows exactly what triggered the failure. Most failures come from sensor malfunctions, exhaust system issues, or engine performance problems that affect emissions output.
You’re not penalized for a failed test as long as you’re within your compliance window. CARB gives you 90 days before your deadline to submit a passing test, so if you fail early, you have time to make repairs and retest. We provide clear documentation of what needs fixing, and once repairs are done, you schedule a retest.
If you fail after receiving a Notice to Submit to Testing, you have 30 days to get a passing result uploaded or face enforcement. That’s why testing early matters. It gives you a buffer to handle repairs without triggering fines or registration holds.
No. Our service is limited to model year 2013 or newer trucks with a GVWR over 14,000 pounds. That’s the scope of the Clean Truck Check program we’re credentialed for, and it’s also where OBD-II systems became standard in heavy-duty diesel vehicles.
If your truck is a 2012 or earlier model, or if it’s under 14,000 pounds GVWR, this service doesn’t apply to you. CARB’s Clean Truck Check program targets newer heavy-duty trucks because they have onboard diagnostic systems that allow for standardized emissions testing.
Lighter vehicles and older trucks may still need smog checks, but they fall under different testing requirements. We focus specifically on the Clean Truck Check program for 2013+ heavy-duty vehicles, which is where our expertise and credentialing apply.
Testing costs vary depending on whether you need mobile service or in-station testing. Mobile testing comes to your location, which saves you time but adds a service fee. In-station testing at our Stevenson Ranch location is the most cost-effective option if you can bring your truck in.
You also need to pay CARB’s annual compliance fee, which is separate from the testing cost. That fee goes directly to the state and covers your registration in the CTC-VIS system. We can walk you through that payment process when you schedule your test.
What matters more than the upfront cost is what you avoid by staying compliant. A single day of non-compliance can trigger fines up to $10,000 per vehicle. Registration holds prevent renewals, which means your truck can’t legally operate. Ports and freight terminals deny access to non-compliant vehicles. The cost of testing is minimal compared to the cost of falling out of compliance.
Starting January 1, 2025, you need emissions testing twice a year—every six months. That’s the current requirement for heavy-duty vehicles under the Clean Truck Check program, and it applies to nearly all diesel and alternative fuel trucks with a GVWR over 14,000 pounds.
In October 2027, the requirement increases to four times per year for OBD-equipped vehicles. That means if your truck has onboard diagnostic systems, you’ll need quarterly testing. CARB is ramping up enforcement and testing frequency to reduce NOx emissions and improve air quality across California.
You’ll receive notices from CARB when your testing deadline approaches, but it’s smarter to stay ahead of those deadlines. We recommend scheduling your tests 60 to 90 days in advance so you have time to address any issues before enforcement kicks in. Missing a deadline triggers a 30-day countdown to submit a passing test, and if you miss that window, you’re looking at fines and registration holds.
Yes. If you’re managing multiple trucks in Stevenson Ranch or nearby areas, we can schedule a single visit to test your entire fleet. That keeps all your vehicles on the same compliance timeline and eliminates the need to coordinate separate appointments or pull trucks off routes one at a time.
Mobile testing is as accurate and official as in-station testing. We bring the same credentialed equipment, follow the same CARB protocols, and upload results to CTC-VIS immediately. The only difference is location—we come to you instead of you coming to us.
Fleet testing makes the most sense when you’re managing semi-annual or quarterly compliance deadlines for multiple vehicles. You get all your trucks tested in one day, all your results uploaded at once, and clear documentation for every vehicle. It’s the most efficient way to stay compliant without disrupting operations.
CTC-VIS is CARB’s online system for tracking Clean Truck Check compliance. It stands for Clean Truck Check Vehicle Information System, and yes, you need to register your truck in it if you’re subject to the program. Registration is required before you can submit emissions test results.
When you register, you’ll enter your vehicle information, pay the annual compliance fee, and create an account that tracks your testing history and deadlines. Once your truck is registered, all test results get uploaded directly to your CTC-VIS profile. That’s how CARB monitors compliance and how the DMV knows whether to issue a registration hold.
If you haven’t registered yet, we can guide you through the process when you schedule testing. It’s not complicated, but it’s required. Without CTC-VIS registration, your test results can’t be submitted, and you won’t be compliant even if you pass the emissions test. Think of it as the administrative side of staying legal—testing is the technical side, and CTC-VIS is the reporting side.
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