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You avoid fines that start at $1,000 and climb to $10,000 per vehicle, per day. You prevent DMV registration holds that shut down your operation overnight. You meet California’s twice-yearly emissions testing requirement without scrambling at the deadline.
This matters because CARB isn’t just sending letters anymore. They’re using roadside monitoring, license plate readers, and coordinated enforcement with CHP at border crossings and ports. If your truck gets flagged, you have 30 days to submit to testing or face compounding penalties.
The Clean Truck Check program applies to diesel trucks with a gross vehicle weight rating over 14,000 pounds and model year 2013 or newer engines equipped with OBD systems. If your truck fits that description and operates in California—even if it’s registered out of state—you’re required to comply. Testing happens twice a year starting January 1, 2025, and moves to quarterly by October 2027.
Staying compliant means you keep your registration active, your trucks on the road, and your business moving. It means you’re not dealing with surprise penalties or explaining to clients why a load didn’t make it.
We operate in Home Gardens with CARB credentialed testers who handle heavy-duty diesel compliance every day. We’re not a general smog shop trying to figure out semi truck regulations on the fly. We focus specifically on the Clean Truck Check program for 2013 and newer diesel engines over 14,000 pounds GVWR.
Home Gardens sits in Riverside County, where trucking, construction, and manufacturing drive the local economy. Over 1,500 residents here work in those industries, and many depend on keeping their heavy-duty vehicles compliant to stay in business. We understand what’s at stake when your livelihood depends on your truck staying legal.
We submit test results directly to CARB within required timeframes, keep records for your fleet, and stay current on regulatory changes so you don’t have to track every update yourself. When issues come up, we communicate directly with CARB to resolve them quickly.
You bring your 2013 or newer diesel truck to our Home Gardens location. We verify your vehicle qualifies—over 14,000 pounds GVWR with an OBD-equipped diesel engine. If it doesn’t meet those specs, we’ll tell you upfront because this program doesn’t apply to older trucks or lighter vehicles.
We connect CARB-certified OBD scanning equipment to your truck’s diagnostic port. The system reads emission control system data, checks for fault codes, and verifies your diesel particulate filter and other emission controls are functioning properly. This isn’t a tailpipe test—it’s a digital scan of your truck’s onboard systems.
The scan takes about 15-20 minutes if everything checks out. We review the results with you immediately. If your truck passes, we submit the results to CARB electronically, and you’re compliant for the next testing period. If issues show up, we explain what needs repair and what your timeline looks like to avoid penalties.
You can submit test results up to 90 days before your compliance deadline, which gives you room to address any problems without the pressure of an immediate deadline. We track your testing schedule and can remind you when your next test is due.
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California’s Clean Truck Check program requires three things: annual reporting of your vehicle information, paying an annual compliance fee of $31.18, and completing emissions testing twice a year. The testing requirement started October 1, 2024, with the first deadline hitting January 1, 2025.
This applies to every diesel truck over 14,000 pounds GVWR with a 2013 or newer engine that operates in California. Doesn’t matter if your truck is registered in Nevada, Arizona, or anywhere else—if you’re driving in California, you’re subject to these rules. CARB estimates about 1 million heavy-duty trucks and buses operate in the state, and enforcement is active.
In Riverside County, where Home Gardens sits, trucking connects local manufacturing and construction to the rest of Southern California. The region depends on commercial vehicles, which means staying compliant isn’t optional—it’s how you protect your ability to work. Penalties escalate fast, and DMV holds happen without warning.
Testing moves to quarterly starting October 1, 2027 for OBD-equipped vehicles. That’s not far off, and it means compliance becomes a regular part of your maintenance schedule. The sooner you build this into your routine, the less disruptive it becomes.
Your truck qualifies if it has a gross vehicle weight rating over 14,000 pounds and a diesel engine from model year 2013 or newer equipped with onboard diagnostics. This includes semi trucks, heavy-duty pickups, box trucks, and other commercial diesel vehicles that meet those specs.
The program does not apply to trucks with older engines or vehicles under 14,000 pounds GVWR, even if they’re diesel. CARB designed this specifically for newer heavy-duty diesel engines that have OBD systems capable of monitoring emission controls in real time.
If you’re not sure whether your truck qualifies, check your vehicle registration for the GVWR and your engine’s model year. You can also bring your truck to our Home Gardens location and we’ll verify eligibility before testing. We won’t waste your time testing a vehicle that doesn’t fall under the program.
CARB can issue penalties starting at $1,000 per vehicle and escalating to $10,000 per vehicle per day for continued non-compliance. Those fines compound daily, which means a week of non-compliance can cost you $70,000 for a single truck. If you run multiple vehicles, multiply that across your fleet.
Beyond fines, CARB can place a hold on your DMV registration, which prevents you from renewing your registration and legally operating the vehicle. That’s an immediate shutdown of your ability to work, and it doesn’t get lifted until you come into compliance and resolve any outstanding penalties.
CARB also uses roadside monitoring and license plate readers to identify high-emitting vehicles. If your truck gets flagged, you receive a Notice to Submit to Testing with a 30-day deadline. Missing that deadline triggers the penalty process. The enforcement is real, and it’s happening at border crossings, ports, and railyards across California.
Right now, you need to test twice a year. The program started October 1, 2024, with the first compliance deadline on January 1, 2025. Your specific testing schedule depends on your vehicle identification number—CARB assigns deadlines based on the last digit of your VIN.
Starting October 1, 2027, testing moves to quarterly for OBD-equipped vehicles. That means four times a year instead of two. CARB is phasing this in to give operators time to adjust, but the increase is coming whether freight rates improve or not.
You can submit test results up to 90 days before your deadline, which gives you flexibility to schedule around your operation. If you’re running a tight schedule or dealing with equipment issues, that 90-day window lets you get ahead instead of scrambling at the last minute. We recommend testing early so you have time to address any problems that come up.
Yes. If your truck operates in California, you’re required to comply with CARB regulations regardless of where it’s registered. That includes trucks based in Nevada, Arizona, Oregon, or any other state that regularly cross into California for deliveries, pickups, or transit.
CARB doesn’t care about your registration state—they care about whether your vehicle operates on California roads. The Clean Truck Check program applies to all heavy-duty diesel trucks over 14,000 pounds GVWR with 2013 or newer engines, period. Out-of-state operators get caught at border crossings, weigh stations, and ports where CARB coordinates enforcement with CHP.
We test out-of-state trucks at our Home Gardens location regularly. The process is identical, and we submit results to CARB the same way. If you’re running routes through Southern California, getting tested locally saves you from dealing with compliance issues at the border or during a delivery.
We’ll tell you exactly what the OBD scan found—whether it’s a fault code, a malfunctioning diesel particulate filter, or another emission control issue. You’ll know what needs repair and what your options are for getting back into compliance.
You’ll need to get the issue fixed and then retest. The repairs have to address whatever the OBD system flagged, which usually means working with a diesel mechanic who understands emission control systems on heavy-duty trucks. Once repairs are done, you come back for another scan to verify everything’s working properly.
If you’re up against a compliance deadline, time matters. We can retest as soon as repairs are complete, and we’ll submit passing results to CARB immediately. If penalties are already in play, getting compliant stops the daily fines from compounding further. In some cases, we’ve helped clients communicate with CARB to negotiate reduced penalties after coming into compliance, but that depends on your specific situation and compliance history.
Testing costs vary by provider, but you’re also paying an annual CARB compliance fee of $31.18 directly to the state. That fee is separate from the testing itself and covers CARB’s administration of the Clean Truck Check program. It adjusts for inflation each year.
When you’re comparing testing prices, make sure you’re comparing certified providers who submit results correctly and on time. Cheap testing that doesn’t get submitted properly or uses non-certified equipment costs you more in the long run if CARB doesn’t accept the results and you end up retesting or facing penalties.
We price our testing to reflect the certification, equipment, and expertise required to do this right. You’re paying for CARB credentialed testers who understand heavy-duty diesel systems and submit results directly to the state within required timeframes. That’s not the same as a general smog check, and it shouldn’t be priced like one. Call us for current pricing specific to your vehicle and testing schedule.
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