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Starting January 1, 2024, California requires proof of compliance for trucks over 14,000 pounds GVWR. Miss it, and the DMV blocks your registration. Get pulled over without it, and you’re looking at a 30-day Notice to Submit to Testing.
You need a passing test on file. That’s not negotiable anymore.
We handle CARB emissions testing for 2013 and newer diesel engines and 2018 and newer alternative fuel engines. The test plugs into your OBD system, checks for emissions compliance, and uploads results directly to CARB’s database. You get proof of compliance. Your truck stays on the road. Your registration stays clean.
This isn’t about passing inspection once and forgetting about it. Starting in 2025, testing goes semi-annual. By 2027, it’s quarterly. The Inland Empire runs on freight, and Cherry Valley sits right in the middle of that corridor. You can’t afford downtime or compliance gaps.
We operate with CARB credentialed testers who completed the state’s official training course and maintain current certification. We’re not winging this. We know the Clean Truck Check program inside and out because we had to pass the same 80% exam threshold CARB requires.
Cherry Valley and the surrounding Inland Empire see heavy commercial traffic daily. We’ve built our business around serving fleet operators, owner-operators, and out-of-state drivers who need fast, accurate compliance testing without the runaround.
We use CARB-certified OBD test devices from the approved vendor list. Our process follows state protocol exactly. You’re not getting a shortcut—you’re getting it done right the first time.
First, we verify your truck qualifies. That means checking the model year, engine type, and GVWR. If you’re driving a 2013 or newer diesel or a 2018 or newer alternative fuel vehicle over 14,000 pounds, you’re in scope.
Next, we connect a CARB-certified OBD device to your truck’s diagnostic port. The system runs through emissions data, checks for fault codes, and confirms your engine’s emissions control systems are functioning. This isn’t a visual inspection. It’s a data pull that CARB reviews.
Once the test completes, results upload directly to CARB’s compliance database. If you pass, you’re done. If something flags, we walk you through what needs fixing before you retest. You can submit a passing test up to 90 days before your deadline, so there’s time to address issues without panic.
You’ll receive documentation showing compliance. Keep it with your vehicle records. If you get pulled into a roadside check, that’s your proof.
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This applies to heavy-duty trucks, buses, and commercial vehicles with a gross vehicle weight rating over 14,000 pounds. Your engine has to be 2013 or newer for diesel, or 2018 or newer for alternative fuels like CNG or propane. Older trucks and lighter vehicles don’t fall under Clean Truck Check requirements.
The first compliance deadline is January 1, 2024. After that, periodic testing starts July 1, 2024. In 2025, you’ll need testing twice a year. By 2027, it jumps to four times annually. Agricultural vehicles get annual testing only, but everyone else is on the escalating schedule.
Cherry Valley’s location along the I-10 corridor means CARB enforcement is active here. Roadside monitoring can trigger a Notice to Submit to Testing, giving you 30 days to comply. That’s not much time if you’re mid-haul or managing a fleet. Getting ahead of deadlines keeps you out of that pressure cooker.
We also offer mobile testing to minimize your downtime. If pulling a truck off the road costs you money, we’ll come to your yard or depot. You stay operational while we handle compliance.
If your truck fails, the test results still upload to CARB, but you won’t have proof of compliance until you pass. You’ll need to diagnose and repair whatever triggered the failure—usually an emissions control system issue or fault code that wasn’t cleared.
We provide a report showing exactly what failed so you’re not guessing. Once repairs are done, you retest. There’s no limit on retests, but each one takes time. That’s why submitting your test up to 90 days before the deadline matters. It gives you a buffer to fix problems without risking a registration block.
If your deadline is tight and you fail, you’re in a tough spot. The DMV won’t renew registration without proof of compliance, and CARB enforcement can pull you off the road. Getting it right the first time is always cheaper and faster than scrambling after a failure.
Yes. If your truck operates in California, you need CARB compliance regardless of where it’s registered. Out-of-state trucks with a GVWR over 14,000 pounds and engines that meet the model year requirements fall under the same Clean Truck Check rules.
CARB doesn’t care about your home state. If you’re driving California roads, you’re subject to California emissions regulations. Roadside enforcement checks for compliance, and if you don’t have it, you’ll get a Notice to Submit to Testing with a 30-day deadline.
Many out-of-state operators get caught off guard by this. They assume California rules don’t apply to them because their truck is plated elsewhere. That’s not how it works. If you run regular routes through California or make occasional trips here, get tested before you cross the state line. It’s easier than dealing with enforcement after the fact.
You can submit a passing test up to 90 days before your compliance deadline. That’s a three-month window to get tested, address any failures, and retest if needed without cutting it close.
Most operators wait until the last minute, then panic if something goes wrong. If you test early and fail, you have time to get repairs done and come back for a retest. If you test early and pass, you’re done and don’t have to think about it again until the next cycle.
The 90-day rule is designed to give you flexibility. Use it. Testing early also means you’re not competing with everyone else who waited until the deadline. Scheduling is easier, and you’re not stuck in a line of trucks all trying to comply at once.
A regular smog check applies to passenger vehicles and light-duty trucks under 14,000 pounds. CARB compliance testing—officially called Clean Truck Check—applies only to heavy-duty vehicles over 14,000 pounds GVWR with 2013 or newer diesel engines or 2018 or newer alternative fuel engines.
The testing process is different too. Clean Truck Check uses OBD diagnostics to pull emissions data directly from your truck’s computer system. It’s not a tailpipe test. The device connects to your diagnostic port, reads fault codes and emissions performance, then uploads results to CARB’s database.
You can’t use a regular smog shop for this. The tester has to be CARB credentialed specifically for Clean Truck Check, and they have to use approved OBD testing equipment. If someone tells you they can do a “regular smog test” on your semi, they either don’t understand the regulations or they’re not properly certified.
The actual test takes about 15 to 30 minutes once we connect the OBD device. That’s just the data pull and upload. If your truck has fault codes or the system needs to run through additional checks, it can take longer.
What slows things down is usually prep work. If your check engine light is on, we need to know why before testing. If your OBD system isn’t ready because you recently cleared codes or did repairs, the test won’t run. The system needs to complete its drive cycle first.
Scheduling matters too. If you show up without an appointment during a busy period, you might wait. We offer mobile testing to skip that entirely. We come to you, test on-site, and you keep working. For fleet operators managing multiple trucks, mobile testing is the fastest way to stay compliant without pulling vehicles off the road one by one.
Yes. We handle fleet testing for operators managing multiple trucks. Instead of bringing vehicles in one at a time, we can schedule mobile testing at your yard or depot and run through your entire fleet in a single session.
Fleet testing makes sense if you’re managing compliance deadlines for five, ten, or twenty trucks. You’re not losing a day of operation per vehicle. We show up, test everything that’s due, upload results to CARB, and you get documentation for each truck.
This also helps with record-keeping. You’ll have all your compliance dates aligned, so you’re not tracking different deadlines for every vehicle. When testing goes semi-annual in 2025 and quarterly in 2027, that kind of organization saves you headaches. We can set up recurring testing schedules so you’re never scrambling to meet a deadline.
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