Hear from Our Customers
You’re running a business, not navigating bureaucracy. But California’s Clean Truck Check program doesn’t care about your schedule—it cares about compliance. If your 2013 or newer heavy-duty diesel truck isn’t tested on time, you’re looking at registration holds, roadside flags, and trucks sitting idle when they should be generating revenue.
That’s where we come in. We handle CARB emissions testing for heavy-duty vehicles over 14,000 pounds so you can focus on what actually makes you money. Our CARB credentialed testers know the regulations inside and out, which means your test gets done right the first time, submitted properly to the state database, and your fleet keeps moving.
No surprises. No runaround. Just straightforward testing that keeps you compliant with California CARB requirements and protects your ability to operate. You get documentation that satisfies the state, and you get back to work.
We serve the Temescal Valley area with the kind of testing service that fleet operators and owner-operators actually need—fast, accurate, and compliant. We’re CARB credentialed, which isn’t optional for this work. It’s the baseline. What sets us apart is understanding that your truck being off the road costs you money every hour.
Temescal Valley sits in the heart of Riverside County’s logistics corridor, where freight and commercial transport keep the Inland Empire economy moving. With over 52,000 trucking businesses operating across California and regulations tightening every year, you need a testing facility that gets it done without the hassle.
We’ve built our reputation on knowing the regulations, respecting your time, and giving you clear answers. No upselling. No confusion. Just the testing you’re required to have, done by people who know what they’re doing.
First, we verify your truck qualifies—model year 2013 or newer with a gross vehicle weight rating over 14,000 pounds. If it doesn’t meet both criteria, this isn’t the test you need. If it does, we move forward.
We connect to your truck’s onboard diagnostics system using CARB-approved equipment. This OBD test checks for emissions-related faults and ensures your diesel engine is operating within California’s standards. It’s not a visual inspection or a tailpipe test. It’s a data pull that tells us whether your emissions control systems are functioning properly.
Once the test is complete, we submit the results directly to CARB’s CTC-VIS database. You get documentation showing you’re compliant, which satisfies the state’s semi-annual testing requirement. If you’ve received a Notice to Submit to Testing letter, this clears that flag and prevents enforcement action.
The whole process is designed to minimize your downtime. You’re not here all day. You’re in, tested, documented, and back on the road. That’s how CARB diesel compliance should work.
Ready to get started?
You’re getting a CARB HD I/M test performed by credentialed professionals using state-certified equipment. That’s the technical part. Practically, you’re getting proof that your truck meets California’s emissions standards and won’t get flagged at weigh stations or hit with registration issues.
Most heavy-duty diesel trucks in California need testing twice a year. Starting in October 2027, OBD-equipped vehicles will need testing quarterly. That’s the reality for anyone operating in this state. Temescal Valley’s location puts you right in the mix of Southern California’s freight network, where compliance isn’t optional—it’s part of doing business.
We also handle the $30 annual compliance fee that CARB requires. It’s separate from the test itself, but it’s part of staying legal. We make sure everything gets submitted correctly so you’re not dealing with follow-up notices or administrative headaches down the line.
This isn’t about selling you extras. It’s about making sure your 2013 or newer heavy-duty truck meets the state’s requirements so you can keep operating without interruption. That’s what you need, and that’s what we do.
If you operate a diesel truck that’s model year 2013 or newer with a gross vehicle weight rating over 14,000 pounds in California, this isn’t optional. It’s a state requirement under CARB’s Heavy-Duty Inspection and Maintenance program. The testing became mandatory in October 2024, and all compliance deadlines starting January 2025 require a passing test.
If you ignore it, you’re looking at registration holds, which means you can’t renew your vehicle registration until you comply. You could also receive a Notice to Submit to Testing letter, which gives you 30 days to get tested or face enforcement action. Roadside monitoring can flag non-compliant vehicles, and citations can follow.
Most qualifying trucks need testing twice a year. If you’re selected for testing and don’t comply, the state will know. The system tracks it. So yes, if your truck fits the criteria, you need this done. It’s not a recommendation—it’s the law.
Your truck qualifies if it meets two specific criteria: it must be model year 2013 or newer, and it must have a gross vehicle weight rating over 14,000 pounds. Both conditions have to be true. If your truck is older than 2013, this test doesn’t apply. If it’s under 14,000 pounds GVWR, it doesn’t apply either.
This program targets heavy-duty diesel vehicles—think Class 7 and Class 8 trucks, semi-trucks, and large commercial vehicles. These are the trucks that still produce the majority of on-road nitrogen oxide and particulate emissions in California, which is why CARB is focusing enforcement here.
If you’re not sure about your truck’s GVWR, check the vehicle identification plate or your registration. If you’re still uncertain, bring your paperwork in and we’ll tell you whether you need this test or a different type of emissions check. We’re not going to test a vehicle that doesn’t qualify—that wastes your time and ours.
If your truck fails, you’ll need to get it repaired and retested. The test results will show which emissions-related systems or components triggered the failure. Most failures come from malfunctioning diesel particulate filters, faulty sensors, or issues with the exhaust gas recirculation system.
You’re allowed to submit a test up to 90 days before your compliance deadline, which gives you time to address any problems before they become urgent. If you wait until the last minute and fail, you’re under pressure to get repairs done fast—and that usually costs more and creates downtime you can’t afford.
Once repairs are complete, you come back for a retest. We run the same OBD check, and if everything’s functioning properly, you pass. We submit the passing results to CARB, and you’re compliant. The key is not ignoring warning lights or delaying maintenance. If your check engine light is on, there’s a good chance you’re not passing this test.
You can’t just go anywhere. The test must be performed by a CARB credentialed tester at an authorized facility. That credential isn’t automatic—it requires specific training, certification, and approval from the California Air Resources Board. If the facility isn’t credentialed, the test doesn’t count.
This is different from a regular smog check. CARB HD I/M testing for heavy-duty vehicles requires specialized equipment and knowledge of diesel emissions systems. Not every smog shop is set up to handle trucks over 14,000 pounds, and not every technician is trained on the OBD protocols that CARB requires for this program.
We’re CARB credentialed for Clean Truck Check testing. That means when you test here, the results are valid and get submitted properly to the state database. If you test somewhere that’s not credentialed, you’re wasting your time and money—and you’ll still be non-compliant.
Testing costs vary depending on the facility, but you’re typically looking at $50 to $75 per vehicle for the test itself. There’s also a separate $30 annual compliance fee that goes directly to CARB. Some facilities charge more, especially if they’re bundling services you don’t need. We keep it straightforward—you pay for the test and the compliance fee, and that’s it.
As for time, the actual testing process takes about 30 to 45 minutes if there are no issues. We’re not tearing your truck apart. We’re connecting to the OBD system, running diagnostics, and checking emissions data. If everything’s functioning properly, you’re in and out quickly.
The biggest time factor is scheduling. If you show up during peak hours or without an appointment, you might wait. If you plan ahead, especially if you’re managing a fleet, we can work with you to minimize downtime. The test itself is fast—it’s the logistics around it that you need to manage.
A regular smog check applies to lighter passenger vehicles and uses tailpipe emissions testing or OBD checks depending on the vehicle’s age and weight. A Clean Truck Check is specifically for heavy-duty diesel trucks—model year 2013 or newer with a GVWR over 14,000 pounds. It’s part of CARB’s Heavy-Duty Inspection and Maintenance program, which is separate from the standard smog check program.
The Clean Truck Check uses OBD diagnostics to evaluate your truck’s emissions control systems. It’s checking for faults in components like the diesel particulate filter, NOx sensors, and exhaust gas recirculation system. It’s not measuring tailpipe emissions directly—it’s verifying that your onboard systems are working as designed.
You can’t substitute one for the other. If you have a heavy-duty diesel truck that qualifies for Clean Truck Check, a regular smog test won’t satisfy the requirement. The state tracks these separately, and the testing equipment and procedures are different. Make sure you’re getting the right test for your vehicle, or you’ll end up having to come back and do it again.
Local Resources
Useful Links
Other Services we provide in Temescal Valley
