Hear from Our Customers
You’re not dealing with registration holds that sideline your trucks for days or weeks. You’re not scrambling when CARB flags your vehicle after roadside monitoring picks up elevated emissions. You’re not writing checks for $1,000 to $10,000 per vehicle, per day because you missed a compliance deadline.
When your heavy-duty diesel or alternative fuel truck meets California CARB compliant standards, your registration renews on time. Your trucks stay on the road generating revenue instead of sitting in a yard waiting for paperwork. Your fleet avoids the kind of penalties that can genuinely threaten your operating budget.
California requires semi-annual emissions compliance testing for trucks with a GVWR over 14,000 pounds starting with model year 2013 and newer. That’s twice a year, submitted by your registration expiration date. Miss it, and the consequences stack up fast—financially and operationally. Meeting those deadlines means you control your schedule instead of reacting to enforcement notices and emergency repair situations.
We’ve been helping truck operators in Hemet and across California stay compliant with CARB regulations since 2005. We’re state-certified credentialed testers, which means we’ve completed CARB’s official Tester Training Course and passed the exam required to perform valid Clean Truck Check testing.
Hemet’s location along major freight corridors means heavy-duty trucks move through here constantly. With 516 carriers operating in the area, the demand for reliable CARB diesel compliance testing is real. You need someone who understands the regulations, performs accurate testing, and submits results correctly the first time.
We bring mobile testing directly to your location in Hemet. That means less downtime for your fleet and fewer logistical headaches for you. We handle the testing, submit the results to CARB’s system, and make sure you’re covered when registration deadlines approach.
First, we confirm your truck qualifies—model year 2013 or newer with a GVWR over 14,000 pounds. This service doesn’t apply to older trucks or lighter vehicles. If your truck has a 2013 or newer diesel engine, or a 2018 or newer alternative fuel engine, we’ll perform On-Board Diagnostic (OBD) testing that pulls data directly from your truck’s emissions control system.
We connect to your vehicle’s OBD port and run the compliance check. The system reads fault codes, monitors emissions performance, and verifies that your truck’s emissions controls are functioning as California requires. For trucks without OBD requirements, we perform smoke opacity testing to measure visible emissions.
Once testing is complete, we submit passing results directly to CARB’s database. You’ll receive documentation showing your truck is compliant, and that data ties to your vehicle’s registration. You can submit results up to 90 days before your registration expiration, which gives you flexibility to plan around your operating schedule. If your truck doesn’t pass, we’ll explain what needs repair and help you understand the timeline for retesting—because you’ve only got 30 days from a Notice to Submit to Testing to get a passing result on file.
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You’re getting emissions compliance testing performed by a CARB-certified credentialed tester who knows how to handle heavy-duty diesel and alternative fuel vehicles correctly. We test your truck, submit results to CARB, and provide documentation that proves compliance when the DMV checks your registration status.
California’s Clean Truck Check program became mandatory January 1, 2025. That means every heavy-duty truck over 14,000 pounds GVWR with a model year 2013 or newer must submit passing emissions tests twice a year. In Hemet, where freight movement is constant and fleets operate on tight schedules, missing a compliance deadline can mean registration holds that take trucks out of service immediately.
We offer mobile testing, so you’re not driving trucks to a testing facility and waiting. We come to your yard, your shop, or wherever your trucks are located in Hemet. That cuts down on the operational disruption and keeps your fleet moving. We also track your testing dates and can remind you when deadlines are approaching, so you’re not caught off guard by expiration dates.
Heavy-duty vehicles represent only 3% of California’s vehicle population but generate more than 50% of nitrogen oxide and diesel particulate pollution from mobile sources. CARB’s enforcement is serious, and they use roadside monitoring and automated license plate readers to flag high emitters. When your truck gets flagged, you have 30 days to submit a passing test. We help you stay ahead of that scenario by keeping your compliance current.
If your truck has a GVWR over 14,000 pounds and is model year 2013 or newer, yes. California’s Clean Truck Check program requires semi-annual emissions testing for heavy-duty diesel and alternative fuel vehicles. This applies whether you’re an owner-operator with one truck or managing a fleet.
The testing requirement is tied to your registration renewal. You need to submit passing emissions compliance tests by your registration expiration date, and you can submit results up to 90 days in advance. If you don’t submit passing tests, the DMV can place a hold on your registration, which means your truck can’t legally operate.
Hemet-based trucks that travel throughout California are subject to the same rules. CARB uses roadside emissions monitoring and automated license plate readers to identify high emitters, so even if your registration is current, you can still receive a Notice to Submit to Testing if your truck is flagged. That gives you 30 days to get a passing test on file.
You’ll need to repair whatever caused the failure and retest before your compliance deadline. If your truck fails OBD testing, the system will show fault codes that indicate which emissions control components aren’t working correctly. If it fails smoke opacity testing, that means visible emissions exceeded California’s limits.
You’re responsible for getting those repairs done. Once repairs are complete, you’ll need to retest and submit a passing result to CARB. If you received a Notice to Submit to Testing, you have 30 calendar days from that notice to submit a passing test. If you’re testing in advance of your registration renewal, you have until your expiration date.
Failing a test isn’t the end of the world, but ignoring it is expensive. Penalties for non-compliance range from $1,000 to $10,000 per vehicle per day depending on the violation. Registration holds can take your truck out of service, which means lost revenue on top of fines. Getting repairs done quickly and retesting is the only way to avoid those consequences.
You need a CARB-credentialed tester to perform valid Clean Truck Check testing. California requires testers to complete an official online training course and pass an exam before they’re authorized to submit test results. If someone who isn’t credentialed tests your truck, those results won’t count toward your compliance requirement.
CARB credentialed testers know how to connect to OBD systems correctly, interpret fault codes, perform smoke opacity testing, and submit results to CARB’s database in the required format. The testing process has specific protocols, and errors can invalidate your results or delay your compliance status.
We’re a certified credentialed tester serving Hemet and the surrounding area. We handle the entire process—testing, documentation, and submission—so you know it’s done right. Trying to cut corners with uncertified testing just creates bigger problems when the DMV or CARB checks your compliance status and finds nothing on file.
Testing costs vary depending on whether you bring your truck to a facility or use mobile service. In-house testing typically runs around $50 to $100 per vehicle. Mobile testing, where we come to your location in Hemet, generally costs between $150 and $200 per vehicle, though pricing can adjust based on distance and the number of trucks you’re testing.
Mobile service costs more because it saves you time and operational disruption. Instead of taking trucks out of service to drive to a testing facility, wait for testing, and drive back, we bring the equipment to you. For fleets with multiple trucks, that difference in downtime can easily justify the mobile fee.
Compare that to the cost of non-compliance. Fines start at $1,000 per vehicle per day and can reach $10,000 per day for serious violations. A registration hold can sideline a truck for days or weeks, costing you far more in lost revenue than the price of testing. Spending $150 to $200 twice a year to stay compliant is a small investment compared to the financial hit of penalties and downtime.
A regular smog check applies to passenger vehicles and light-duty trucks under 14,000 pounds GVWR. CARB Clean Truck Check is specifically for heavy-duty vehicles over 14,000 pounds with model year 2013 or newer. The testing procedures, equipment, and reporting requirements are completely different.
Clean Truck Check uses On-Board Diagnostic (OBD) testing for diesel engines model year 2013 and newer, and alternative fuel engines model year 2018 and newer. This pulls data directly from the truck’s emissions control system and checks for fault codes. For trucks without OBD, smoke opacity testing measures visible emissions. Regular smog checks don’t use these methods.
You can’t take a heavy-duty truck to a standard smog check station and expect it to meet Clean Truck Check requirements. The testing has to be performed by a CARB credentialed tester who’s trained specifically for heavy-duty diesel and alternative fuel vehicles. Results have to be submitted to CARB’s Clean Truck Check database, not the standard smog check system. Using the wrong type of testing means you’re still non-compliant even if you paid for a test.
Twice a year, with passing tests submitted by your registration expiration date. California’s Clean Truck Check program requires semi-annual emissions testing for heavy-duty trucks over 14,000 pounds GVWR, model year 2013 and newer. You can submit results up to 90 days before your expiration date, which gives you some flexibility in scheduling.
Starting October 2027, trucks equipped with OBD systems will need to submit test results four times per year. That’s a significant increase in testing frequency, and it means staying on top of your compliance schedule becomes even more important. Right now, you’re looking at two tests annually, but that requirement is increasing.
If CARB flags your truck through roadside monitoring or automated license plate readers, you’ll receive a Notice to Submit to Testing. That’s separate from your regular semi-annual requirement, and you have 30 days to submit a passing test. Missing that deadline or your regular registration deadline triggers penalties and potential registration holds. Keeping track of your testing schedule and submitting results on time is the only way to avoid those consequences.
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