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You’re running a business, not a compliance department. But if you operate a 2013 or newer heavy-duty truck over 14,000 pounds in California, CARB emissions testing isn’t optional—it’s mandatory twice a year, and eventually four times annually for newer diesel engines.
Miss a deadline or ignore a notice, and the DMV puts a registration hold on your truck. That means it’s grounded until you clear it, which can take days if you’re scrambling to find a certified tester. Meanwhile, your truck sits. Your schedule falls apart. Your revenue stops.
We bring the test to you. Our mobile CARB certified smog check service comes to your location in Canyon Lake or anywhere across Riverside County, tests your truck with state-certified OBD equipment, and uploads results directly to CARB the same day. If you’ve got a hold, we can typically clear it within 24 to 48 hours so your truck gets back to work.
All SMOG Motors has been keeping diesel fleets compliant since 2008. Before that, our team spent 25 years as owner-operators in the construction industry—so we know what it’s like to deal with equipment that can’t move because of a compliance issue you didn’t even know existed.
We’re CARB-credentialed testers certified by the state to perform smoke opacity and emissions control system testing. We’ve worked with single-truck operators and full fleets across Canyon Lake, Lake Elsinore, Corona, Temecula, Murrieta, and the broader Inland Empire. We’ve also successfully negotiated reduced penalties for clients who got caught off guard by changing regulations.
Canyon Lake’s a tight-knit community with a lot of small business owners who value reliability. We show up on time, test your trucks correctly the first time, and make sure you stay ahead of CARB’s evolving requirements.
First, we confirm your truck qualifies—it needs to be model year 2013 or newer and have a gross vehicle weight rating over 14,000 pounds. If it doesn’t meet both criteria, this service doesn’t apply, and we’ll let you know up front.
Once scheduled, we bring our CARB-certified OBD testing equipment to your location. For 2013 and newer diesel engines, the test connects directly to your truck’s onboard diagnostics system. We’re checking emissions control systems to make sure everything’s functioning within California’s legal limits.
The test itself usually takes less than an hour depending on your truck and any issues we find. As soon as we’re done, results get uploaded instantly to CARB’s system. You’ll get documentation showing you’re compliant, and if there was a DMV registration hold, it typically clears within one to two business days.
If your truck doesn’t pass, we’ll walk you through what needs to be fixed and can retest once repairs are complete. We also stay in direct contact with CARB if there are any complications or questions about your compliance status.
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You get a certified mobile smog test performed by a CARB-credentialed tester using state-approved equipment. That means the test is valid, the results are recognized by CARB and the DMV, and you’re legally covered.
We handle the $30+ annual compliance fee payment that’s required per vehicle. We also upload your test results directly to CARB the same day, so there’s no waiting around or wondering if it went through. If you’re dealing with a registration hold, we prioritize getting that cleared as fast as possible—usually within 24 to 48 hours.
Canyon Lake and the surrounding Riverside County area have seen increased enforcement since 2023. CARB now uses roadside emissions monitoring and license plate readers to flag high-emitting vehicles. If your truck gets flagged, you’ll receive a Notice to Submit to Testing, and you have a limited window to comply before penalties start piling up. Those fines can hit $10,000 per year if you’re a carrier hiring non-compliant trucks, or if you’re operating one yourself.
We also keep you updated on regulatory changes. CARB’s rules aren’t static—testing frequency, eligible model years, and enforcement methods shift over time. Knowing what’s coming helps you avoid surprises and budget accordingly.
Yes. If your truck operates in California, it has to comply with CARB rules regardless of where it’s registered.
This catches a lot of out-of-state operators off guard. You might be based in Nevada or Arizona, but if your truck crosses into California for deliveries, pickups, or any kind of work, CARB considers it subject to California emissions regulations. That includes the Clean Truck Check program, which requires semi-annual emissions testing for heavy-duty diesel trucks.
CARB has ramped up enforcement using roadside monitoring devices and license plate readers. If your out-of-state truck gets flagged for high emissions, you’ll receive a compliance notice and you’ll need to get tested. Ignoring it leads to registration holds and fines that don’t go away just because your truck isn’t California-registered.
Most heavy-duty trucks over 14,000 pounds with 2013 or newer engines need testing twice a year right now. But that frequency is increasing—eventually, you’ll be looking at four tests annually for newer diesel engines.
CARB’s Clean Truck Check program became fully effective in October 2024, and all compliance deadlines on or after January 1, 2025, require passing emissions tests. The testing schedule depends on your truck’s model year, engine type, and weight class, but the trend is toward more frequent testing as CARB tightens emissions standards.
If you miss a test or fail to pay the annual compliance fee (which starts at $30 per vehicle), the DMV will place a registration hold. That means your truck can’t legally operate until the hold is cleared, which requires completing the test and getting results uploaded to CARB. We can usually clear holds within 24 to 48 hours once we test your truck.
If your truck fails, you’ll need to get the emissions control system repaired and then retest. We’ll tell you exactly what failed so you know what needs fixing.
Common failure points include malfunctioning diesel particulate filters, faulty sensors, or issues with the selective catalytic reduction system. For 2013 and newer trucks, we’re testing through the OBD system, so the diagnostics are pretty specific about what’s wrong.
Once repairs are done, we come back and retest. You’re not compliant until you pass, and the DMV hold won’t lift until CARB receives passing results. The good news is that if you address the issue quickly, you can get back on the road without major delays. The bad news is that ignoring a failed test or putting off repairs just makes the problem worse—penalties escalate, and CARB doesn’t forget.
No. We only test trucks that are model year 2013 or newer AND have a gross vehicle weight rating over 14,000 pounds. If your truck doesn’t meet both of those criteria, this service doesn’t apply.
That’s a hard line set by CARB’s Clean Truck Check program, which specifically targets newer heavy-duty diesel engines. Older trucks or lighter vehicles fall under different testing requirements—or sometimes no testing requirement at all, depending on the specifics.
If you’re not sure whether your truck qualifies, check the model year and GVWR. Both have to meet the threshold. If you’ve got an older truck or something under 14,000 pounds, we’ll let you know up front that we’re not the right fit, and we can point you toward resources that might help. We’re not going to waste your time pretending we can test something we can’t.
Pricing depends on how many trucks you need tested. Individual trucks start at $199, but if you’re testing multiple vehicles, the per-truck cost drops—$149 each for two to five trucks, and $129 each for six or more.
That includes the mobile service, the certified test using CARB-approved OBD equipment, instant upload of results to CARB, and handling the annual compliance fee payment. If you’ve got a DMV registration hold, clearing it is part of the service—no extra charge for that.
Some testing centers around Riverside County charge as low as $75, but they’re not mobile, and you’re responsible for bringing your truck to them. If your truck is already grounded because of a hold, that’s not an option. Our pricing reflects the convenience of coming to you, the speed of clearing holds, and the fact that we’re handling everything from start to finish so you don’t have to chase down paperwork or wonder if it got filed correctly.
If you miss a compliance deadline, the DMV puts a registration hold on your truck, which means it can’t legally operate. On top of that, CARB can issue fines that start small but grow fast if you continue to ignore the requirement.
For carriers hiring non-compliant trucks, penalties can reach $10,000 per year. For individual operators, fines vary depending on how long you’ve been out of compliance and whether you’ve been flagged by roadside enforcement. CARB uses emissions monitoring devices and license plate readers to screen for high-emitting vehicles, and if your truck gets flagged, you’ll receive a Notice to Submit to Testing with a deadline.
Compliance notices don’t disappear. Ignoring them just makes the situation more expensive and more complicated. We’ve helped negotiate reduced penalties for clients who got caught off guard by regulation changes, but the best move is to stay ahead of deadlines in the first place. Testing twice a year isn’t fun, but it’s a lot cheaper and less stressful than dealing with fines and grounded trucks.
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