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You’re running a business, and your trucks need to stay on the road. California’s Clean Truck Check program isn’t optional anymore. If you’re operating a 2013 or newer diesel truck over 14,000 lbs GVWR, you’re required to test twice a year right now—and starting in October 2027, that jumps to four times annually.
Miss a test and the DMV blocks your registration. Ignore the requirement entirely and you’re looking at fines starting at $1,000 per day, per vehicle. Some violations have hit $10,000.
We handle CARB HD I/M testing for heavy-duty diesel trucks that meet the requirements. You show up, we run the OBD test using CARB-certified equipment, and we file your certificate electronically with the DMV. You get back on the road with proof of compliance and nothing holding up your registration.
We’re a STAR-certified smog check station serving Redondo Beach and the South Bay area. We’ve been testing vehicles for emissions compliance for years, and we’re fully credentialed to perform Clean Truck Check testing for heavy-duty diesel vehicles.
Redondo Beach sits right in the heart of LA County’s commercial corridor. Plenty of fleets, owner-operators, and motorhome owners pass through here—and plenty of them are scrambling to figure out CARB’s requirements. We’re here because this regulation is confusing, the penalties are steep, and most truck owners just want someone who knows what they’re doing.
We’re licensed, we’re local, and we’re equipped to handle CARB diesel compliance testing the right way.
This isn’t a traditional smog test. Clean Truck Check uses OBD diagnostics to monitor your truck’s emissions systems. We connect to your vehicle’s onboard computer and pull data directly from the engine control module.
First, we verify your truck qualifies—2013 or newer model year, diesel engine, over 14,000 lbs GVWR. Then we run the OBD scan using CARB-certified testing equipment. The system checks for fault codes, monitors emissions performance, and confirms your truck meets California’s heavy-duty vehicle compliance standards.
Once the test is complete, we submit your certificate electronically to the DMV. You’ll receive documentation showing you’ve met the Clean Truck Check requirement. If your truck passes, you’re good for another six months. If there’s an issue, we’ll walk you through what needs attention before you can retest.
The whole process is straightforward. You’re not waiting around all day, and you’re not guessing whether it’s done right.
Ready to get started?
California’s Clean Truck Check program targets heavy-duty diesel trucks with 2013 and newer engines. If your truck has a GVWR over 14,000 lbs and meets that model year requirement, you’re in the program. Right now, testing happens twice a year. In October 2027, it increases to four times annually.
You’ll also need to pay an annual compliance fee—$31.18 for 2025. That’s separate from the testing itself, but it’s part of staying legal in California.
Redondo Beach is a hub for commercial traffic heading through the South Bay and into LA County. If you’re running routes through California, your trucks need to be compliant or they’re not moving. The DMV will block registration renewals for non-compliant vehicles, and CARB enforcement isn’t slowing down. Fines add up fast, and they don’t care if you didn’t know about the requirement.
We’re set up to handle CARB emissions testing for semi trucks, box trucks, motorhomes, and any other qualifying heavy-duty diesel vehicle. You get tested, you get your certificate, and you stay on the road.
Your truck needs Clean Truck Check testing if it meets two criteria: it has a diesel engine from model year 2013 or newer, and it has a gross vehicle weight rating over 14,000 pounds. This applies to semi trucks, commercial fleets, heavy-duty motorhomes, and other large diesel vehicles.
If your truck is older than 2013 or weighs less than 14,000 lbs GVWR, this requirement doesn’t apply to you. The program specifically targets newer heavy-duty diesel engines equipped with OBD systems.
Right now, you’re required to test twice per year. Starting in October 2027, that frequency increases to four times annually. California’s DMV will block your registration if you’re not compliant, so this isn’t something you can skip.
Currently, Clean Truck Check testing happens twice a year for qualifying vehicles. That’s every six months. You’ll need to stay on top of your testing schedule because missing a deadline means your registration gets flagged.
In October 2027, the requirement changes. At that point, you’ll need to test four times per year—every three months. CARB is tightening the schedule to keep closer tabs on emissions from heavy-duty diesel trucks operating in California.
If you’re running a fleet, you’re managing multiple testing cycles across multiple vehicles. If you’re an owner-operator, you’re still looking at the same frequency. Either way, staying compliant means planning ahead and making sure your trucks get tested on time.
If your truck fails, you’ll need to address whatever issue triggered the failure before you can retest. The OBD system flags fault codes related to emissions controls—things like malfunctioning sensors, DPF issues, or SCR system problems.
You’ll get a report showing what failed. From there, you’ll need to get the repairs done. Once the issue is fixed, you come back for a retest. You can’t legally operate the truck in California until it passes and you have a valid compliance certificate.
Failing a test doesn’t mean you’re immediately fined, but operating a non-compliant truck does. If you’re caught running a truck that hasn’t passed or hasn’t been tested at all, you’re looking at penalties starting at $1,000 per day, per vehicle. Get it fixed, get it retested, and get back on the road the right way.
No. Clean Truck Check testing can only be performed at CARB-certified stations with credentialed testers. Not every smog check station is set up to handle heavy-duty vehicle compliance testing, and not every location has the equipment or authorization to run OBD diagnostics on trucks over 14,000 lbs.
We’re a CARB-certified station in Redondo Beach with the credentials and equipment to perform Clean Truck Check testing. We’re set up specifically to handle 2013 and newer diesel trucks that fall under the HD I/M program.
If you’re based in the South Bay or passing through LA County, we’re a local option that understands the requirements and can get your truck tested without the runaround. Don’t assume any shop can do this—make sure they’re certified before you waste your time.
Testing costs vary by location and provider. You’ll need to contact the testing station directly to get pricing. What you should know is that the test itself is separate from California’s annual compliance fee, which is $31.18 for 2025.
The compliance fee goes to CARB and covers your participation in the Clean Truck Check program. The testing fee goes to the station performing your inspection. Both are required to stay compliant.
If you’re running multiple trucks, those costs add up fast—especially once the testing frequency increases to four times per year in 2027. Budget for it now, because this isn’t going away. It’s a cost of doing business in California if you’re operating heavy-duty diesel trucks.
Bring your vehicle registration and any previous Clean Truck Check certificates if you have them. We’ll need to verify your truck’s VIN, model year, and GVWR to confirm it qualifies for testing under the CARB HD I/M program.
Make sure your truck is in good working order before you come in. If your check engine light is on or you’re already seeing fault codes, there’s a good chance you’ll fail the OBD scan. Address obvious issues beforehand to save yourself a retest.
You don’t need an appointment at every location, but calling ahead is smart—especially if you’re managing a fleet or working around tight delivery schedules. We’ll get you in, get you tested, and get your certificate filed with the DMV so you can keep moving.
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