Hear from Our Customers
You’re running a tight operation. Every truck off the road costs you money. Every compliance deadline you miss puts your registration at risk.
If you’re operating 2013 or newer diesel trucks over 14,000 pounds in California, you already know CARB requires semi-annual Clean Truck Check testing. Miss it, and you’re looking at registration holds that take days to clear. Ignore it completely, and penalties start stacking up fast.
Here’s what compliance actually gets you: your trucks stay registered without DMV holds. You avoid fines that can reach into the thousands per vehicle. Your drivers don’t get pulled off the road mid-route. And when you test up to 90 days before your deadline, you’ve got time to handle any repairs without scrambling.
This isn’t about checking a box. It’s about keeping your operation running while the state tightens emissions standards across the board.
We focus specifically on OBD testing for newer heavy-duty vehicles. That’s the testing required for 2013 and newer diesel trucks and 2018 and newer alternative fuel trucks over 14,000 lbs GVWR.
We’re CARB credentialed, which means we’ve completed the state’s required training and maintain current certification. When you pass, your results upload directly to CARB’s official database. No delays. No paperwork gaps.
Thousand Palms sits right in the middle of Riverside County’s logistics corridor. We understand the trucking operations here—small fleets, owner-operators, construction outfits running a handful of trucks. You don’t have time for runaround, and you need testing that fits your schedule, not the other way around.
First, we verify your truck qualifies. You need a 2013 or newer model year with a GVWR over 14,000 pounds. Older trucks or lighter vehicles don’t fall under this program—they follow different testing requirements.
Once confirmed, we connect to your truck’s onboard diagnostics system. That’s the OBD port. We’re pulling data directly from your engine’s computer to check emissions performance and system readiness. This isn’t a visual inspection or a tailpipe test. It’s a digital readout of how your emissions controls are functioning.
The test itself runs quickly. If your truck passes, we upload the certification to CARB’s CTC-VIS database immediately. You’ll see it reflected in the state system, and your compliance clock resets. If something flags, we’ll walk you through what needs attention and how much time you have to address it before your deadline.
You can test up to 90 days early. That window exists so you’re not stuck rushing repairs at the last minute. Use it.
Ready to get started?
Every Clean Truck Check includes OBD system testing performed by a CARB credentialed tester. We verify your emissions control systems are working as designed and that your truck meets California’s heavy-duty inspection and maintenance standards.
When you pass, certification uploads to the state database right away. No waiting. No mailing forms. CARB sees it, DMV sees it, and your compliance status updates in real time.
In Riverside County, trucking isn’t just long-haul. You’ve got construction fleets, landscaping operations, local delivery trucks—all running newer equipment that falls under this program. Heavy-duty vehicles make up a small percentage of California’s total vehicles but produce over half the state’s smog-causing pollution. That’s why CARB enforcement is strict and why testing requirements are twice a year for most trucks.
You also need to factor in the annual compliance fee, which is separate from testing. For 2025, that’s $31.18 per vehicle. It’s not optional, and it’s not included in the test cost. Budget for both.
No. Clean Truck Check only applies to 2013 and newer diesel trucks or 2018 and newer alternative fuel trucks with a GVWR over 14,000 pounds.
If your truck is older, it may still need emissions testing, but it falls under a different program—usually smoke opacity testing for older diesel engines. That’s a completely separate process with different requirements and different testing equipment.
Don’t assume your truck needs this just because it’s commercial or heavy-duty. Model year and weight rating determine which program applies. If you’re not sure, check your truck’s door placard for the GVWR and your title for the model year. Those two numbers tell you everything.
Most trucks under the Clean Truck Check program need testing twice a year. That’s semi-annual compliance, and it’s not negotiable if your vehicle falls under CARB’s heavy-duty inspection and maintenance requirements.
Your specific deadline depends on your truck’s VIN and when it was last tested. CARB tracks this in their system, and you’ll receive notices as deadlines approach. Ignore those notices, and you risk registration holds.
The good news is you can test up to 90 days before your deadline. That gives you a three-month buffer to get it done and still have time to handle repairs if something doesn’t pass. Don’t wait until the last week. If you fail and need parts or shop time, you’re racing the clock with your registration on the line.
You get a failure report that explains what triggered the problem. Usually, it’s a fault code in the emissions control system—something like a malfunctioning sensor, a DPF issue, or a problem with the SCR system.
From there, you need to get the issue repaired and retested. The clock doesn’t stop just because you failed. Your compliance deadline still stands, and if you miss it, you’re looking at registration holds and potential penalties.
This is exactly why testing early matters. If you wait until the last minute and fail, you’re scrambling to find a shop, get parts, and retest before CARB locks your registration. Test 60 or 90 days out, and a failure is inconvenient but manageable. Test the day before your deadline, and a failure can shut your truck down.
Mobile testing is available in many cases, and it’s one of the most requested services from fleet operators in Thousand Palms and across Riverside County. Bringing the testing to your yard or shop saves you drive time and keeps your trucks in rotation.
Not every testing provider offers mobile service, and those who do may charge extra for the convenience. But when you’re running multiple trucks or operating on tight schedules, the cost is usually worth it compared to the downtime of driving each truck to a testing site.
If mobile testing works for your operation, ask us about scheduling and pricing upfront. Some providers batch multiple trucks in one visit to reduce costs. Others charge per unit plus a trip fee. Know what you’re paying before you book.
Clean Truck Check is specifically for heavy-duty trucks over 14,000 pounds with OBD-equipped engines—2013 and newer for diesel, 2018 and newer for alternative fuel. It’s a CARB program focused on commercial and heavy-duty vehicles, not passenger cars or light trucks.
A regular smog check applies to lighter vehicles under 14,000 pounds. The testing equipment is different, the standards are different, and the certification process is different. You can’t use a passenger car smog check to satisfy Clean Truck Check requirements, and you can’t use Clean Truck Check certification for a light-duty vehicle.
If you’re running a mixed fleet—some trucks over 14,000 pounds, some under—you need to know which vehicles fall under which program. The model year, weight rating, and fuel type determine everything. Get it wrong, and you’re wasting time and money on the wrong test.
Testing costs vary depending on the provider and whether you need mobile service. You’ll see prices ranging from around $75 per truck up to $135 or more, especially if you’re adding mobile testing or need same-day service.
That’s separate from the annual CARB compliance fee, which is $31.18 per vehicle for 2025. The compliance fee goes to the state. The testing fee goes to whoever performs your test.
When you’re comparing prices, don’t just look at the bottom line. Ask about turnaround time, mobile availability, and whether they’re CARB credentialed. Cheap testing that takes all day or doesn’t upload correctly to the state database costs you more in the long run. You want certified, efficient testing that keeps your trucks moving and your compliance current.
Local Resources
Useful Links
Other Services we provide in Thousand Palms
