Hear from Our Customers
If you’re running 2013 or newer diesel trucks with a GVWR over 14,000 pounds in California, you already know CARB doesn’t mess around. Missing your Clean Truck Check means registration holds at the DMV, fines that can hit $10,000 per vehicle per day, and trucks sitting idle when they should be earning.
You need testing done right, on time, by someone who actually knows the CARB HD I/M program inside and out. That’s what we do in Good Hope, CA.
Our CARB-credentialed testers handle your heavy-duty vehicle compliance so you can focus on what matters: keeping your equipment on the road and your business moving. Most OBD-equipped trucks are done in under five minutes. You get proper documentation, clean records with CARB, and zero hassle with the DMV when registration comes around.
We’ve been handling emissions testing in Good Hope, CA for years, and when CARB rolled out the Clean Truck Check program in 2024, we made sure our team was trained, credentialed, and ready. We’re not just another smog shop trying to figure out heavy-duty compliance on the fly.
Good Hope sits in an area where commercial trucking, agriculture, and logistics intersect. That means diesel trucks are everywhere, and CARB compliance isn’t optional. We’ve worked with owner-operators, fleet managers, and out-of-state drivers who need testing done fast and done right.
You’re not getting a sales pitch here. You’re getting a team that understands the regulations, has the credentials CARB requires, and knows what it’s like to run a business where downtime costs real money.
First, we verify your truck qualifies: 2013 or newer model year, diesel engine, and over 14,000 pounds GVWR. If you’ve received a Notice to Submit to Testing from CARB, you’ve got 30 days to get it done. If you’re on the semi-annual schedule, you already know your deadline.
We plug into your truck’s OBD system using CARB-certified equipment. The test pulls diagnostic data directly from your engine’s computer. For most trucks, this takes less than five minutes. We’re checking emissions performance, not doing a full mechanical inspection.
Once the test is complete, results go straight to CARB’s system. You get documentation showing you’re compliant, and your record updates with the DMV. If there’s an issue, we’ll tell you what it is and what needs to happen next. No runaround, no vague answers.
Ready to get started?
California’s Clean Truck Check program started October 1, 2024. If your diesel truck is model year 2013 or newer and weighs over 14,000 pounds, you’re in the program. That includes semi trucks, delivery trucks, motorhomes, and any heavy-duty diesel rig registered in California or operating here regularly.
Right now, most trucks need testing twice a year. Starting in October 2027, OBD-equipped vehicles will need testing four times a year. CARB also charges an annual compliance fee of $31.18 for 2025, separate from the testing itself.
Good Hope’s location means you’re likely running routes through Central California, where CARB enforcement is active and consistent. Out-of-state operators passing through need to be compliant too. The program isn’t going away, and the penalties for skipping it are severe enough that it’s not worth gambling on.
Testing has to be done by a CARB-credentialed tester. That’s not every smog shop. We’ve completed CARB’s training, passed their exam, and use their approved equipment. When you come to us in Good Hope, you’re getting service that meets every regulatory requirement CARB has set.
Most heavy-duty diesel trucks in the CARB program need testing twice a year right now. That’s semi-annual, meaning every six months.
If your truck is OBD-equipped, that schedule changes in October 2027. At that point, you’ll need testing four times a year—quarterly. CARB is phasing this in, so if you’re running newer equipment, expect more frequent testing in the near future.
You’ll also get a Notice to Submit to Testing from CARB when it’s time. You have 30 days from the date on that notice to complete your test. Missing that window can trigger registration holds and fines, so don’t sit on it.
If your truck fails, you’ll need to get the issue repaired and then come back for a retest. The test results will tell you what triggered the failure—usually it’s a fault code or emissions system problem flagged by the OBD system.
You’re responsible for getting the repairs done. We can point you in the right direction, but the Clean Truck Check itself is a testing service, not a repair service. Once the work is done, bring the truck back and we’ll retest it.
CARB gives you time to handle repairs, but your truck isn’t compliant until it passes. That means you’re at risk for penalties and registration issues until the problem is fixed and you’ve got a passing test on file.
Yes, if you’re operating in California regularly. CARB’s Clean Truck Check program applies to any heavy-duty diesel truck that meets the criteria—2013 or newer, over 14,000 pounds GVWR—whether it’s registered in California or not.
If you’re an out-of-state operator running loads into or through California, you’re subject to the same compliance requirements as California-registered trucks. CARB tracks this, and enforcement doesn’t stop at the state line.
The good news is the testing process is the same. You can get your Clean Truck Check done at any CARB-credentialed testing location in California, including here in Good Hope. Bring your paperwork, and we’ll get you tested and back on the road.
For most OBD-equipped trucks, the actual test takes less than five minutes. We plug into your truck’s diagnostic port, pull the data, and the system does the rest.
The total time you’re here depends on whether there’s a wait and how quickly we can get your truck into the bay. We try to keep things moving because we know your time matters.
If your truck has an issue that prevents testing—like a dead battery or a problem with the OBD port—that can add time. But assuming your truck is in normal operating condition, you’re looking at a quick in-and-out process. This isn’t like a full DOT inspection or mechanical service. It’s a data pull, plain and simple.
Bring your Notice to Submit to Testing if CARB sent you one. That notice has your vehicle information and the deadline you’re working with.
You’ll also need your vehicle registration or proof of ownership. If you’re an owner-operator, that’s straightforward. If you’re a fleet driver, make sure you’ve got whatever documentation your company requires to authorize testing.
We’ll verify the truck’s VIN, model year, and GVWR to confirm it’s eligible for the program. If everything checks out, we move forward with the test. If something doesn’t match up—like the truck is older than 2013 or under 14,000 pounds—we’ll let you know before we start.
No. The CARB Clean Truck Check program only applies to diesel trucks that are model year 2013 or newer and have a GVWR over 14,000 pounds. If your truck doesn’t meet both of those criteria, it’s not part of this program.
Older trucks or lighter-duty vehicles may still need emissions testing, but that falls under different California smog check requirements. We can help with traditional smog checks for other vehicles, but the Clean Truck Check is specifically for newer heavy-duty diesel equipment.
If you’re not sure whether your truck qualifies, call us. We can look up your vehicle’s specs and tell you whether you need a Clean Truck Check, a regular smog test, or nothing at all. It’s better to ask than to waste a trip.
Local Resources
Useful Links
Other Services we provide in Good Hope
