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You’re running a business, not navigating a maze of state regulations. But here’s what you’re facing: California requires OBD emissions testing for every diesel truck model year 2013 or newer with a GVWR over 14,000 pounds. Miss your deadline, and you’re looking at fines up to $10,000 per vehicle per day.
That’s not a scare tactic. That’s what CARB enforcement looks like in 2025.
Your trucks also face DMV registration holds if you’re not compliant. That means no renewals, no legal operation, and no revenue while your equipment sits. Ports and railyards can deny entry to non-compliant vehicles. The California Highway Patrol runs roadside checks using remote monitoring devices and license plate readers across the state.
You need testing done right, submitted on time, and documented properly. That’s where CARB-certified Clean Truck Check testing comes in. Get your testing done up to 90 days before your deadline so if something fails, you have time to fix it without losing work. You stay compliant, your trucks stay on the road, and your business keeps moving.
We serve the Jurupa Valley trucking community with CARB-credentialed testers who know what’s at stake for your business. Jurupa Valley sits in the heart of Southern California’s logistics corridor, and we understand the pressure you’re under to keep trucks compliant while maintaining tight delivery schedules.
We’re not a general smog shop trying to figure out heavy-duty diesel compliance. We specialize in Clean Truck Check testing for 2013 and newer trucks over 14,000 pounds. You’re dealing with mandatory semi-annual testing that started in January 2025, and it increases to four times per year in 2027.
You need someone who gets the urgency, knows the regulations, and won’t waste your time. That’s what you’ll find here.
The testing process uses CARB-certified OBD diagnostic equipment connected directly to your truck’s onboard computer system. This isn’t a tailpipe test. It’s a full diagnostic scan that checks your diesel emissions systems for compliance with California’s Heavy-Duty Inspection and Maintenance program.
Here’s what happens: You bring your 2013 or newer diesel truck to our facility. We connect to your vehicle’s OBD port and run the required diagnostic tests. The system checks for emissions-related fault codes, monitors performance data, and verifies your truck meets CARB standards. If everything passes, your test results get submitted directly to CARB’s system, and you’re compliant for the next testing period.
If something fails, you’ll know exactly what needs repair. You have a 90-day window before your deadline to get testing done, which gives you time to address any issues without facing penalties or downtime. Once repairs are complete, you come back for a retest.
The annual compliance fee is $31.18 per vehicle for 2025, and you’ll need testing twice per year under current requirements. Your testing schedule depends on your truck’s registration date and CARB’s compliance calendar.
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Your trucks need testing if they meet two criteria: model year 2013 or newer, and GVWR over 14,000 pounds. This applies whether you’re an owner-operator with one truck or managing a fleet of 50. It doesn’t matter if you’re based in California or just passing through—if your truck operates here, it needs to be compliant.
Jurupa Valley’s position in the Inland Empire means you’re likely running freight to Ontario, Riverside, or straight through to the ports. Every one of those routes puts you under CARB jurisdiction. Remote monitoring systems are active throughout Southern California, and CHP conducts roadside inspections regularly.
Testing must be performed by CARB-credentialed testers using approved diagnostic equipment. Results get uploaded to the state’s database automatically. If you receive a Notice to Submit to Testing, you have 30 days to comply or face immediate penalties. Registration renewals get blocked for non-compliant vehicles, and you can’t legally operate until you’re back in compliance.
The program exists because California is targeting an 81-ton daily reduction in NOx emissions from heavy-duty trucks. That means enforcement is real, consistent, and not going away. Your best move is staying ahead of deadlines and keeping your testing current.
Only diesel trucks that are model year 2013 or newer and have a gross vehicle weight rating over 14,000 pounds need Clean Truck Check testing. If your truck is older than 2013, this requirement doesn’t apply to you. If it’s under 14,000 pounds GVWR, you’re also exempt.
This is specifically for heavy-duty diesel vehicles operating in California. It doesn’t matter if you’re registered in another state—if you’re driving in California, you need to comply. The regulation targets newer trucks because they’re equipped with advanced emissions systems and onboard diagnostics that can be tested electronically.
If you’re not sure whether your truck qualifies, check your registration or door placard for the model year and GVWR. Both conditions must be met for the requirement to apply.
Right now, you need testing twice per year. That’s the requirement that went into effect January 1, 2025. In 2027, the frequency increases to four times per year, which means you’ll be testing quarterly.
Your specific testing deadlines depend on your vehicle’s registration date and the compliance schedule CARB assigns to your truck. You’ll receive notifications from CARB when testing is due. You can submit passing test results up to 90 days before your deadline, which is smart if you want to avoid last-minute scrambles or give yourself time to handle repairs if something fails.
Missing a deadline triggers penalties immediately. You’ll face late fees, potential fines, and DMV registration holds that prevent you from renewing your vehicle. If you get a Notice to Submit to Testing from CARB, you have exactly 30 days to get compliant or face escalating consequences.
If your truck fails, you’ll get a detailed report showing exactly what triggered the failure. Most failures involve emissions system faults, sensor issues, or problems with your diesel particulate filter or selective catalytic reduction system. You’ll need to get those issues repaired before you can pass a retest.
The good news is that if you test early—up to 90 days before your deadline—you have time to make repairs without facing penalties or losing work. Once repairs are done, you come back for another test. If you pass, your results get submitted to CARB and you’re compliant.
If you wait until the last minute and fail, you’re in a tougher spot. You can’t legally operate a non-compliant truck, and you’ll face registration holds and potential fines until you’re back in compliance. That’s why testing early matters. It gives you a buffer to handle problems without shutting down your operation.
CARB charges an annual compliance fee of $31.18 per vehicle for 2025. That’s separate from the testing fee itself, which varies by provider. The compliance fee goes directly to CARB to fund the Heavy-Duty Inspection and Maintenance program.
You’ll pay for testing each time you need it—twice per year currently, increasing to four times per year in 2027. The cost of testing depends on where you go and what services are included. What you’re really paying for is CARB-certified equipment, credentialed testers, and proper submission of results to the state database.
Compare that to the cost of non-compliance: fines up to $10,000 per vehicle per day, registration holds that prevent renewals, and lost revenue while your truck sits grounded. Testing is a required business expense, but it’s a fraction of what you’ll pay if you skip it or miss deadlines.
Testing must be performed by CARB-credentialed testers using CARB-certified diagnostic equipment. Not every smog shop or repair facility is set up to do this. You need a facility that specializes in heavy-duty diesel compliance and has the proper credentials and equipment to perform OBD testing on trucks over 14,000 pounds.
We’re equipped and credentialed for Clean Truck Check testing here in Jurupa Valley, CA. We use approved diagnostic tools that connect directly to CARB’s system to submit your results electronically. That means your compliance gets recorded immediately—no paperwork delays or manual submissions that could cause problems.
If you’re working with a facility that isn’t credentialed or doesn’t have the right equipment, your test results won’t be valid. You’ll have to get retested somewhere else, which wastes your time and money. Make sure you’re going to a qualified facility from the start.
A Notice to Submit to Testing means CARB has flagged your vehicle for immediate compliance testing. You have 30 days from the date of the notice to get tested and submit passing results. This isn’t optional, and the deadline is firm.
If you ignore the notice or miss the 30-day window, you’ll face registration holds, fines, and potential enforcement action from CHP during roadside inspections. Your truck can be grounded until you comply, which means lost work and revenue on top of the penalties.
Your best move is to schedule testing as soon as you receive the notice. Bring the notice with you when you come in for testing. If your truck passes, results get submitted immediately and you’re clear. If it fails, you’ll need to make repairs and retest quickly to stay within the 30-day window. Don’t wait on this—CARB enforcement is active and the consequences for non-compliance are severe.
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