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Starting in 2025, your trucks need Clean Truck Check testing every six months. Miss it, and the DMV puts a hold on your registration. Your truck sits. Your schedule falls apart. Your customers get angry.
That’s not a maybe. It’s happening right now to owner-operators and small fleets across Wildomar and Riverside County.
We bring CARB certified testing to your yard or job site. You schedule it, we show up, and your results go straight into the state system. No driving to a shop. No waiting around. Your truck gets tested while you keep working.
This isn’t about passing inspection once and forgetting about it. California CARB compliant testing is now mandatory twice a year for any truck model year 2013 or newer with a gross weight over 14,000 pounds. If you run a semi truck, a heavy-duty diesel, or a commercial vehicle that fits those specs, you’re in the program whether you knew about it or not.
The state isn’t sending reminders. They’re just blocking renewals when you’re not current.
All SMOG Motors focuses exclusively on CARB diesel compliance for commercial trucks. We’re not a general smog shop trying to squeeze in heavy-duty testing between passenger cars. This is what we do.
Our testers are CARB credentialed. That means they completed the state’s HD I/M training course, passed the exam, and hold active certification to perform Clean Truck Check testing. We use approved equipment that connects directly to the CTC-VIS database, so your results update in real time with CARB and the DMV.
Wildomar has a lot of small trucking operations—owner-operators running one to four trucks. You don’t have time to chase down compliance requirements or figure out what changed this year. We handle the testing so you can focus on the work that actually pays.
You call or book online and tell us where your truck is—your business, a job site, wherever. We offer same-day appointments for most locations in Wildomar.
Our mobile technician shows up with CARB certified equipment. They plug into your truck’s onboard diagnostic system and run the emissions compliance test. This applies only to trucks model year 2013 or newer with a GVWR over 14,000 pounds, because those are the only vehicles with the OBD systems California requires for this program.
The test takes about 15 to 30 minutes depending on the truck. Once it’s done, results upload instantly to the Clean Truck Check Vehicle Inspection System. That’s the state database that talks to the DMV. Your truck shows compliant, and there’s no hold on your registration.
You get documentation on the spot. If there’s an issue, we tell you what it is and what needs to happen next. No runaround. You know where you stand before we leave.
This needs to happen every six months now. Some trucks will eventually need testing four times a year depending on engine year and emissions equipment. We can set you up on a schedule so you’re never scrambling at renewal time.
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You get mobile testing at your location. That means we come to you instead of you losing half a day driving to a facility and waiting in line.
You get instant reporting to the state. The second your truck passes, that information goes into the CTC-VIS system and updates your record with CARB and the DMV. No delay, no paperwork you have to mail in, no wondering if it went through.
You get certified testers who know heavy-duty diesel systems. They’re not guessing. They’ve been trained specifically on CARB emissions testing for commercial vehicles, and they’re using the exact equipment the state requires.
If you run multiple trucks, we offer fleet pricing. That’s not a gimmick. It’s a flat discount because testing three trucks at the same location takes us less time per vehicle than driving to three different sites.
Wildomar sits right in the middle of Riverside County’s trucking corridor. A lot of the trucks here are working locally—construction, agriculture, short hauls to distribution centers in Perris or Lake Elsinore. You’re not running cross-country routes, so downtime hits harder. One truck out of service for a compliance issue can mean turning down jobs or paying someone else to cover a load.
We built this service specifically for that reality. You need testing done fast, at your location, without drama. That’s what this is.
Your truck gets flagged as non-compliant in the state system, and the DMV will place a hold on your registration until you fix the issue and retest.
The most common failure points are malfunctioning emissions equipment—things like a faulty diesel particulate filter, issues with the selective catalytic reduction system, or check engine lights related to emissions controls. If your truck fails, we’ll tell you exactly what code came up and what system is causing the problem.
You’ll need to get the repairs done, then schedule a retest. Once the truck passes, the hold gets lifted. The problem is that repairs can take time, and your truck can’t legally operate on California roads until it’s compliant. That’s why catching issues early matters. If you’re testing every six months like you’re supposed to, you’re less likely to get blindsided by a failure right when you need to renew registration.
No. This specific CARB compliance program only applies to trucks model year 2013 and newer with a gross vehicle weight rating over 14,000 pounds.
The reason is that 2013 was when federal emissions standards required onboard diagnostic systems on heavy-duty diesel engines. The Clean Truck Check program uses those OBD systems to pull emissions data. Older trucks don’t have the right diagnostic ports or systems, so they’re not part of this testing requirement.
If your truck is older than 2013, you’re not exempt from all emissions rules—California has other regulations that might apply depending on what you’re hauling and where you operate—but you don’t need the semi-annual Clean Truck Check testing we’re talking about here. This service is specifically for newer heavy-duty trucks that fall under the state’s HD I/M program.
Pricing varies depending on whether you’re testing one truck or multiple vehicles, but mobile CARB emissions testing typically costs less than the first fine you’d pay for non-compliance.
Single violations can run thousands of dollars. CARB’s enforcement settlements regularly hit fleets with hundreds of thousands in penalties when multiple trucks are out of compliance for extended periods. A single truck that’s non-compliant can get fined up to $10,000 per day once enforcement catches up with you.
Testing costs a fraction of that, and it prevents the bigger financial hit. If you’re running a fleet, we offer discounted pricing because we can test multiple trucks in one trip. That saves you money and saves us time. For exact pricing on your situation, you’d need to call and tell us how many trucks you’re testing and where they’re located. We’ll give you a straight number, not a range or an estimate that changes later.
Your truck can be tested anywhere in California by a CARB credentialed tester. It doesn’t have to happen in Wildomar specifically.
What matters is that the tester is certified and the results get uploaded to the Clean Truck Check system. That’s a statewide database, so it doesn’t matter if you get tested in Wildomar, Temecula, Riverside, or San Diego. Once your truck passes and the results are in the system, you’re compliant no matter where the test happened.
We serve Wildomar and the surrounding area because we’re set up for mobile testing in Riverside County. If your truck is here, we’ll come to you. If you’ve got trucks operating in other parts of the state, you’d need to find a credentialed tester in that area or bring the truck to us. The key is making sure whoever does the test is actually certified and using approved equipment, because backyard mechanics with a code reader can’t submit results to the state system.
Right now, trucks model year 2013 and newer with a GVWR over 14,000 pounds need testing every six months. That’s twice a year, and it started being enforced in 2025.
Some trucks will eventually need testing four times a year depending on the engine year and emissions system. The state is phasing that in, but for now, you’re looking at semi-annual testing. That means if you tested in January, you need to test again by July. If you miss the window, the DMV flags your registration as incomplete and you can’t renew until you’re current.
The state isn’t flexible about this. There’s no grace period where they let it slide for a month. The system is automated—if you’re past due, you’re blocked. Setting up a regular testing schedule is the easiest way to avoid problems. We can put you on a reminder system so you’re not trying to remember when your last test was or calculating six-month intervals in your head.
A regular smog check is for passenger vehicles and light-duty trucks under 14,000 pounds. CARB compliance testing—specifically the Clean Truck Check program—is for heavy-duty commercial vehicles with onboard diagnostic systems.
The equipment is different. The testing process is different. The reporting system is different. A regular smog shop that does passenger cars can’t just plug into a semi truck and run this test. The technician needs specific CARB certification for heavy-duty vehicles, and they need access to the CTC-VIS database where commercial truck results get uploaded.
If you walk into a standard smog check place and ask them to test your semi truck, most of them will tell you they don’t do it. The ones that do should be able to show you their CARB credentials for HD I/M testing. If they can’t, they’re not authorized to submit results that count toward your compliance. You’d be wasting time and money on a test that doesn’t clear your registration hold.
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