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Your truck sits when it’s not compliant. The DMV places a registration hold, and you’re looking at 3-5 business days minimum before it clears—assuming you can even get tested right away.
That’s lost revenue. Lost contracts. Scrambling to cover loads with trucks you don’t have.
CARB compliance isn’t optional anymore. Starting January 1, 2025, every heavy-duty diesel truck model year 2013 or newer with a GVWR over 14,000 pounds needs to pass Clean Truck Check emissions testing twice a year. Miss your deadline and you’re facing fines up to $10,000 per vehicle per day, plus the registration hold that keeps your truck parked. Freight terminals and ports can deny you access. Your business stops moving.
We handle CARB certified smog checks for semi trucks and heavy-duty vehicles across Highgrove, CA and the Inland Empire. You get tested by state-credentialed testers, results upload instantly to the CTC-VIS system, and your compliance status updates so you can keep hauling without interruption.
All SMOG Motors isn’t some corporate chain that showed up last month. We’ve spent 25+ years as owner-operators in California’s construction industry, dealing with the same CARB headaches you’re dealing with now.
We’re CARB credentialed testers, which means we’re certified by the state to perform smoke opacity and emissions control system testing on heavy-duty diesel trucks. We’re in the official CARB database. We know the regulations because we’ve had to follow them ourselves.
Highgrove sits right in the middle of the Inland Empire trucking corridor—close to Riverside, Moreno Valley, and every freight route that matters. We’re local, we understand the market here, and we know what it takes to keep trucks compliant in a region where logistics never stops. You’re not getting a sales pitch from us. You’re getting straight answers from people who’ve been where you are.
Here’s what happens when you need CARB diesel compliance testing. First, we verify your truck qualifies—model year 2013 or newer, diesel engine, GVWR over 14,000 pounds. If it doesn’t meet those specs, this testing doesn’t apply to your vehicle.
Once confirmed, we schedule your Clean Truck Check. Our credentialed testers use CARB-certified equipment to scan your truck’s OBD system and perform smoke opacity testing. This isn’t a visual inspection or a quick look-under-the-hood. It’s a full emissions control system test that pulls data directly from your engine’s onboard diagnostics.
Results get uploaded immediately to California’s CTC-VIS reporting system. You’ll know right away if you passed. If you did, your compliance certificate gets issued and the DMV updates within 3-5 business days. If something fails, we’ll tell you exactly what needs fixing and what your options are.
You can submit tests up to 90 days before your compliance deadline, so there’s no reason to wait until the last minute. Most operators in Highgrove are on a semiannual schedule starting in 2025, which means planning ahead keeps you out of trouble.
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California’s Clean Truck Check program targets heavy-duty diesel trucks because they produce over half the state’s smog-causing pollution despite being only 3% of vehicles on the road. CARB estimates this program will prevent 7,500 air quality-related deaths and deliver $75 billion in health benefits. That’s why enforcement is strict and penalties are steep.
Your compliance obligation depends on your truck. If it’s a 2013 or newer diesel with GVWR over 14,000 pounds, you’re in the program. Testing happens twice a year starting in 2025, increasing to four times annually within three years. Each test costs $31.18 for the annual compliance fee, plus testing fees.
Here’s what happens if you ignore it. The DMV places a registration hold on non-compliant vehicles. You can’t renew registration. You can’t legally operate. Freight facilities, cargo ports, and rail yards can deny you access if your compliance status isn’t current. Fines escalate with repeat violations, and CARB doesn’t negotiate much once you’re on their radar.
Highgrove’s location near major freight routes means your trucks are moving through compliance checkpoints regularly. The Inland Empire has one of the highest concentrations of logistics operations in California, which also means one of the highest concentrations of CARB enforcement. You can’t fly under the radar here.
Only heavy-duty diesel trucks model year 2013 or newer with a gross vehicle weight rating over 14,000 pounds require Clean Truck Check emissions testing. That’s the cutoff because 2013 was when OBD-equipped diesel engines became standard, and CARB’s testing equipment scans that onboard diagnostic data.
If your truck is older than 2013, it’s not subject to this program. If it’s under 14,000 pounds GVWR, it’s not covered either. Gas-powered trucks aren’t included. This is specifically for heavy-duty diesel vehicles that meet both the model year and weight requirements.
Don’t assume your truck qualifies just because it’s commercial. We’ve seen operators waste time trying to schedule tests for vehicles that don’t even fall under the regulation. Check your truck’s model year and GVWR before you do anything else.
Starting January 1, 2025, you’re looking at semiannual testing—twice per year. That frequency increases to four times per year within the next three years as CARB ramps up enforcement and tightens the compliance schedule.
Your specific deadlines depend on when your truck was first registered in the Clean Truck Check program. CARB assigns compliance dates, and you can submit test results up to 90 days before your deadline. That 90-day window is there so you’re not scrambling at the last second, but most operators don’t use it until they’ve already missed a deadline once.
Miss your deadline and the DMV places a registration hold. At that point, you’re not just dealing with testing—you’re dealing with getting that hold lifted, which takes 3-5 business days after your compliance certificate is issued. Plan ahead or plan to lose work.
If your truck fails, you get a report that tells you exactly what triggered the failure—whether it’s OBD fault codes, smoke opacity levels, or emissions control system issues. You’ll need to fix whatever’s wrong and retest before your compliance deadline.
The testing itself doesn’t fix anything. We’re not a repair shop. We’re credentialed testers who identify whether your truck meets CARB standards. If it doesn’t, you’ll need to take it to a qualified diesel mechanic who can address the specific issues flagged in your test results.
Retesting costs money and takes time, which is why most operators who’ve been through this once start doing preventive maintenance before their test date. Waiting until you fail to find out your emissions system has problems is the expensive way to stay compliant. Get your truck serviced before you test, not after.
Mobile testing is available. CARB-credentialed testers can come to your location anywhere in California, including Highgrove and the surrounding Inland Empire area. That’s helpful if you’re running a fleet or if your truck is already loaded and you don’t want to deadhead to a testing facility.
Mobile testing uses the same CARB-certified equipment and follows the same procedures as testing at a fixed location. Results still upload instantly to the CTC-VIS system. The difference is convenience—you’re not pulling trucks out of service or rerouting them for compliance.
Not every testing provider offers mobile service, and some charge extra for it. Ask upfront what the cost is and how far in advance you need to schedule. If you’re managing multiple trucks in Highgrove, mobile testing can save you serious time during compliance season.
CARB charges an annual compliance fee of $31.18 for 2025. That’s separate from the testing fee, which varies by provider. You’re paying for the credentialed tester’s time, the certified equipment, and the reporting process that uploads your results to the state system.
Some testing providers charge flat rates. Others charge based on whether it’s mobile or in-shop testing. If your truck fails and you need to retest, that’s another fee. Add it all up and you’re looking at a few hundred dollars per truck per year minimum, depending on how many tests you need and whether you pass the first time.
Compare that to the cost of non-compliance. A single day of fines can hit $10,000 per vehicle. A registration hold means your truck isn’t earning anything while it sits. Losing access to a freight terminal because your compliance status isn’t current can cost you a contract. Testing fees are cheap compared to what happens when you skip them.
The DMV places a registration hold on your vehicle, which means you can’t renew your registration and you can’t legally operate the truck. That’s the immediate consequence. Then you’re looking at fines up to $10,000 per vehicle per day for non-compliance, and those fines escalate with repeated violations.
Freight facilities, ports, and rail yards can deny access to non-compliant trucks. If you show up to a job site or a terminal and your compliance status isn’t current, you’re getting turned away. That’s lost revenue, damaged relationships with customers, and potential contract violations depending on your agreements.
CARB enforcement isn’t a suggestion. They have legislative mandates and they’re actively placing holds and issuing penalties. Some operators think they can delay or ignore it until enforcement catches up with them. That’s an expensive gamble, and it usually doesn’t pay off. Get tested on time or deal with consequences that cost more than the test ever would have.
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