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Your truck stays on the road when you’re compliant. Miss your semi-annual Clean Truck Check and CARB flags your vehicle in their system, triggering an automatic DMV registration hold. That means no legal operation in California until you fix it.
The penalties get worse from there. CARB can fine you up to $10,000 per vehicle per day for non-compliance. In 2022 alone, they collected $21.5 million in penalties from truckers who didn’t stay current.
We handle the testing and submit results directly to CARB’s database so your compliance status updates immediately. You get documentation, your vehicle stays clear in the system, and you avoid the cascade of problems that come with falling behind. This applies specifically to diesel and alternative fuel trucks from model year 2013 or newer with a GVWR over 14,000 pounds.
We serve the trucking corridor that runs through La Puente, CA, where logistics companies, owner-operators, and fleet managers deal with California’s strictest emissions requirements daily. We’re CARB credentialed testers who’ve completed the official training course and passed the state exam.
La Puente sits in the heart of the San Gabriel Valley’s logistics hub. Companies here run everything from single-truck operations to multi-vehicle fleets, hauling oversized loads and navigating complex permit requirements. We understand the pressure you’re under to keep vehicles moving while staying compliant with regulations that keep changing.
We’ve built our testing process around minimizing your downtime and maximizing clarity. You’re not getting a runaround or vague answers about what CARB requires.
You bring your 2013 or newer heavy-duty truck to our La Puente location. We verify your vehicle qualifies for Clean Truck Check based on model year and GVWR, then connect to your truck’s onboard diagnostics system for OBD testing.
The OBD test checks your emissions control systems and pulls diagnostic trouble codes if anything’s flagged. This is the standard test for diesel engines from 2013 forward. We’re looking at whether your emissions equipment is functioning as designed and whether your truck meets CARB’s performance standards.
Once testing is complete, we submit results directly to the CARB CTC-VIS database. You receive documentation showing your compliance status, and your vehicle’s record updates in the state system. If your truck passes, you’re clear for another six months until your next semi-annual test is due.
If there’s an issue, we’ll tell you exactly what needs attention before you can pass. No surprises, no unclear next steps. You’ll know what’s wrong and what it takes to get compliant.
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Clean Truck Check is California’s Heavy-Duty Inspection and Maintenance program, and it’s mandatory for diesel and alternative fuel vehicles with a GVWR over 14,000 pounds. If your truck is model year 2013 or newer, you need OBD testing every six months. Older trucks from 2012 and earlier require smoke opacity testing instead, which is a different process.
You’re also required to pay an annual compliance fee of $31.18 for 2025. Testing must happen semi-annually, and if CARB sends you a Notice to Submit to Testing, you have 30 days to comply or face penalties.
La Puente’s location puts you right in the middle of California’s busiest freight corridors, which means CARB enforcement is active here. Inspectors know the routes, and they’re checking compliance. Trucks operating in California from out of state are also subject to these requirements if they meet the weight and model year criteria.
Starting in October 2027, OBD-equipped vehicles will need testing four times per year instead of two. That’s the direction this program is heading, which means compliance is only going to require more attention, not less.
Your truck needs Clean Truck Check testing if it’s a diesel or alternative fuel vehicle with a gross vehicle weight rating over 14,000 pounds and it’s model year 2013 or newer. This includes semi trucks, box trucks, dump trucks, and other heavy-duty commercial vehicles that meet those criteria.
If your truck is 2012 or older, you’re subject to smoke opacity testing instead, which is a different type of emissions test. Clean Truck Check specifically applies to the newer OBD-equipped engines that came standard starting in 2013.
Out-of-state trucks operating in California also need to comply if they meet the weight and model year requirements. CARB doesn’t exempt you just because your vehicle is registered elsewhere. If you’re running loads in California, you’re subject to California emissions rules.
You need testing every six months right now. That’s the semi-annual requirement for Clean Truck Check. CARB tracks your compliance through their CTC-VIS database, and if you miss your testing window, they flag your vehicle and notify the DMV.
Your testing schedule is based on when you last submitted results. If you tested in January, your next test is due in July. If you tested in March, you’re due again in September. You need to stay on top of this because there’s no grace period once you’re overdue.
Starting in October 2027, the frequency increases to four times per year for OBD-equipped vehicles. That means you’ll need testing every three months instead of every six. CARB is tightening the program over time, so plan for more frequent compliance checks going forward.
If your truck fails, you can’t legally operate it on California roads until you fix the issue and pass a retest. The failure gets reported to CARB, and your vehicle’s compliance status shows as non-compliant in their system.
You’ll need to address whatever caused the failure. Common issues include malfunctioning diesel particulate filters, faulty sensors, or emissions control systems that aren’t performing to spec. We’ll tell you exactly what the OBD test flagged so you know what needs repair.
Once you’ve made the repairs, you come back for a retest. If your truck passes, we submit the passing results to CARB and your compliance status updates. If you don’t fix the issue and continue operating, you’re risking the $10,000 per day penalty on top of potential DMV registration problems.
Testing costs vary by provider, but you’re also required to pay CARB’s annual compliance fee of $31.18 for 2025. That fee goes directly to the state and is separate from whatever the testing station charges for the actual inspection.
Some testing stations charge extra for services like CARB account setup or assistance with the CTC-VIS system. You’ll see prices up to $75 just for account help at some competitors. We keep our pricing straightforward and focus on getting your test done correctly the first time.
If you’re running multiple trucks, ask about fleet pricing. Testing five or ten vehicles on a regular schedule is different from bringing in a single truck twice a year, and the cost structure should reflect that. The key is finding a testing provider who’s efficient and accurate so you’re not paying for retests or dealing with compliance issues down the road.
No. Clean Truck Check with OBD testing only applies to trucks from model year 2013 or newer. If your truck is 2012 or older, you need smoke opacity testing instead, which measures visible emissions from your exhaust.
This is a common point of confusion because both programs fall under CARB’s heavy-duty emissions requirements, but they’re different tests with different equipment. OBD testing connects to your truck’s computer system and pulls diagnostic data. Smoke opacity testing uses a different method to measure particulate matter coming out of your tailpipe.
If you’re running older equipment, you need to find a testing station that handles smoke opacity for heavy-duty vehicles. That’s not the same service as Clean Truck Check, and not every smog station offers it. Make sure you’re clear on your truck’s model year before you schedule testing.
A Notice to Submit to Testing means CARB has flagged your vehicle for immediate compliance testing. You receive this notice if you’re overdue on your semi-annual testing, if your vehicle has been identified during a roadside inspection, or if CARB’s system shows you’re out of compliance.
Once you receive the notice, you have 30 days to get tested and submit results. If you ignore it, CARB escalates enforcement. That can mean DMV registration holds, fines, or both. The 30-day window is firm, and CARB doesn’t extend it just because you’re busy or your truck is out on a long haul.
If you get a Notice to Submit to Testing, treat it as urgent. Bring your truck in as soon as possible, get the test done, and make sure results are submitted to CARB’s database before the deadline. Waiting until day 29 is a bad idea because if something goes wrong with the test or the submission, you’re out of time to fix it.
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