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You’re not looking for a lecture on regulations. You need to know your trucks will pass, your paperwork gets filed correctly, and you won’t wake up to a registration hold that puts your fleet out of commission.
Here’s what compliance actually gets you: no $10,000-per-day penalties, no DMV blocks on registration, and no surprise violations from roadside monitoring. Your trucks stay on the road. Your business keeps moving.
We handle Clean Truck Check testing for trucks with 2013 or newer diesel engines over 14,000 pounds GVWR. That’s it. We don’t test older trucks or lighter vehicles because the requirements are completely different. If your truck fits that category, we know exactly what CARB wants to see—and how to get you compliant without the runaround.
All SMOG Motors has been helping truck owners in South San Jose Hills stay compliant for nearly two decades. We’re not a general repair shop that does emissions testing on the side. This is what we do.
Our technicians are CARB credentialed, which means they’ve completed the state training, passed the exam, and use certified OBD testing equipment. We submit results directly to CARB, so there’s no gap between your test and your compliance record.
South San Jose Hills sits in the heart of LA County’s industrial corridor. You’re surrounded by logistics companies, freight operators, and owner-operators running the same compliance gauntlet. We built our service around what actually works here—fast turnarounds, mobile testing options, and people who understand that downtime costs you money.
First, we verify your truck qualifies—2013 or newer model year with a gross vehicle weight rating over 14,000 pounds. If it doesn’t meet both criteria, this isn’t the right test.
Once confirmed, we connect to your truck’s onboard diagnostics system using CARB certified equipment. We’re pulling data directly from your engine’s computer—no smoke opacity test, no visual inspection. The OBD scan checks emissions performance against California’s standards for heavy-duty diesel vehicles.
If your truck passes, we submit the results to CARB the same day. You’ll see the update in your Clean Truck Check account, and you can download your compliance certificate as proof. If something flags, we’ll tell you exactly what needs attention before you retest.
You’ve got a 90-day window before your deadline to submit a passing test, which gives you time to handle repairs if needed. Most operators test semi-annually, but starting in 2027, some trucks will move to quarterly testing. We’ll keep you ahead of those changes.
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CARB compliance isn’t just a smog test. It’s a program with three parts: registration in the Clean Truck Check system, annual compliance fees, and passing emissions tests submitted on schedule.
The annual fee is $31.18 per vehicle in 2025, increasing to $32.13 in 2026. That’s separate from testing. If you don’t pay it, your registration gets flagged. If you don’t submit passing tests, same result.
In South San Jose Hills, you’re operating in an area CARB monitors heavily. They use roadside devices to screen for high emitters. If your truck gets flagged, you’ll receive a Notice to Submit to Testing within 30 days. That’s not a suggestion—it’s a compliance order. Miss it, and you’re looking at penalties that start at thousands and scale fast.
We handle the testing and result submission. You handle registration and fee payment through your CTC-VIS account. If you need help navigating that system or figuring out your deadlines, we’ll walk you through it. This isn’t complicated once you know what you’re doing, but the first time through can feel like a maze.
Yes, if you’re operating in California. CARB compliance applies to any heavy-duty truck over 14,000 pounds GVWR with a 2013 or newer diesel engine that drives on public roads or highways in the state—regardless of where it’s registered.
Out-of-state trucks aren’t exempt. You still need to register in the Clean Truck Check system, pay the annual compliance fee, and submit passing emissions tests on the same schedule as California-registered vehicles. If you’re running interstate routes that bring you through California regularly, this applies to you.
The penalties for non-compliance don’t care about your license plate. CARB can issue fines up to $10,000 per vehicle per day, and they actively monitor highways in areas like South San Jose Hills where freight traffic is heavy. If you’re caught operating without compliance, the financial hit can be severe enough to sideline your operation.
Most trucks test semi-annually—twice a year. Your specific schedule depends on your vehicle’s compliance group and the deadlines CARB assigns in your Clean Truck Check account.
You can submit a passing test up to 90 days before your deadline, which gives you a buffer if repairs are needed. If your truck fails the OBD scan, you’ll need to fix the issue and retest before the deadline passes. Missing a deadline triggers a registration hold, and that means your truck can’t legally operate until you’re back in compliance.
Starting in October 2027, CARB is moving some vehicles to quarterly testing—four times a year instead of two. That change is coming whether you’re ready or not, and it’s going to increase the administrative load for fleet operators. The earlier you build a routine around testing, the less disruptive that shift will be. We’re set up to handle higher testing frequencies without bottlenecking your schedule.
You’ll get a detailed report showing what triggered the failure. Most failures come from emissions system malfunctions—issues with the diesel particulate filter, exhaust gas recirculation, or sensors that monitor engine performance.
Once you know what’s wrong, you’ll need to get it repaired. We don’t do the repairs ourselves, but we can point you toward what needs fixing based on the OBD data. After repairs, you retest. If it passes, we submit the results to CARB and you’re compliant.
The clock matters here. If you’re testing close to your deadline and you fail, you’ve got limited time to repair and retest before CARB flags your registration. That’s why testing early—within that 90-day window—is smart. It gives you room to handle problems without the pressure of an imminent deadline. A registration hold doesn’t just stop one truck. If you’re running a fleet, it can cascade into serious operational disruptions.
No. Our service is specifically for trucks with model year 2013 or newer diesel engines over 14,000 pounds GVWR. That’s not a limitation we chose—it’s how CARB structured the Clean Truck Check program.
Trucks with 2012 and older engines aren’t part of this OBD-based testing system. They fall under different regulations, and the testing process is completely separate. We focus exclusively on the 2013+ category because the requirements, equipment, and credentialing are specialized.
If you’re running older trucks, you’ll need to find a facility that handles the appropriate testing for your model year. We’re not set up for that, and trying to force a square peg into a round hole wastes your time and ours. But if your fleet includes both older and newer trucks, we can handle everything 2013 and up while you route the older vehicles elsewhere.
We offer mobile testing. If you’ve got multiple trucks or you’re operating on tight schedules, we can come to your location in South San Jose Hills and handle testing on-site.
Mobile service cuts down on the time your trucks spend off the road. Instead of driving to a testing facility, waiting in line, and driving back, we bring the certified OBD equipment to you. For fleet operators, that’s a significant efficiency gain—especially when you’re juggling compliance deadlines across multiple vehicles.
There’s no compromise on accuracy or compliance. We’re using the same CARB certified devices and following the same protocols whether we’re at your yard or you’re at our location. The results get submitted to CARB the same way, and your compliance record updates just as fast. If mobile testing makes sense for your operation, we’ll make it work. If you’d rather bring the truck in, that’s fine too. We’re flexible because we know your schedule isn’t.
There are two costs: the annual compliance fee CARB charges, and the testing fee you pay each time your truck gets tested. The CARB fee is $31.18 per vehicle in 2025, going up to $32.13 in 2026. That’s non-negotiable and goes directly to the state.
Testing fees vary depending on whether you’re doing single-vehicle tests or fleet volume. We price competitively, and if you’re running multiple trucks, we’ll work out a rate structure that makes sense. The key is that testing isn’t optional—it’s a cost of doing business in California with heavy-duty diesel trucks.
The real cost you need to worry about is non-compliance. A $10,000-per-day penalty erases any savings you thought you’d get by skipping tests or letting deadlines slide. A registration hold can take your truck out of service indefinitely, and if you’re under contract to deliver loads, that’s lost revenue you’re not getting back. Compliance costs are predictable and manageable. Penalties and downtime aren’t. That’s the math that matters.
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