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You’re not losing a day of revenue sitting in line wondering if your truck will pass. You’re getting tested by a CARB credentialed facility that uploads results directly to the state database the same day.
That means no registration holds blocking your renewal. No surprise fines when you pull into a port or freight terminal. No panic calls from your dispatcher because CARB flagged your VIN.
If you’re running a 2013 or newer diesel or alternative fuel truck over 14,000 pounds GVWR in California, you already know the Clean Truck Check isn’t optional. It’s twice a year right now, and it’s going to four times a year starting in 2027. Miss a deadline and you’re looking at DMV blocks, penalties up to $10,000 per vehicle, and trucks that can’t legally operate. We make sure that doesn’t happen.
All SMOG Motors is a CARB credentialed testing facility serving the San Gabriel Valley. We’re not trying to be everything to everyone—we focus on heavy-duty diesel compliance for trucks that actually fall under the Clean Truck Check program.
That means 2013 and newer model year engines with a GVWR over 14,000 pounds. If your truck doesn’t meet that criteria, we’ll tell you upfront. If it does, we’ll get you tested, uploaded, and back on the road without the runaround.
San Gabriel sits right in the heart of one of the busiest freight corridors in California. You’ve got owner-operators, small fleets, and independent drivers all trying to stay compliant in a regulatory environment that changes every year. We’ve built our process around that reality—fast turnaround, clear communication, and no surprises on price or timeline.
You schedule your appointment or pull in during business hours. We verify your truck qualifies under the Clean Truck Check program—2013 or newer, over 14,000 lbs GVWR. If it doesn’t qualify, we let you know immediately so you’re not wasting time.
Once confirmed, we connect to your truck’s OBD system using CARB certified diagnostic equipment. The test pulls data directly from your engine’s onboard computer—no visual inspections, no opacity tests, just a clean electronic read of your emissions system performance. Most tests take under 30 minutes.
After the test completes, we upload your results in real time to California’s CTC-VIS database. That’s the system CARB and the DMV use to track compliance. If you had a registration hold, it clears within hours. You’ll get documentation showing your test date, results, and your next due date so you can plan ahead.
If your truck doesn’t pass, we’ll walk you through what the system flagged and what needs to happen next. You’ll have 30 days from the initial flag to submit a passing test. We don’t do repairs, but we’ll point you in the right direction so you’re not stuck guessing.
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You’re paying for a CARB credentialed tester who knows the regulations, certified OBD testing equipment that connects directly to your truck’s emissions system, and immediate upload to the state compliance database. That’s it. No upsells, no add-ons, no “while you’re here” pitches.
The 2025 compliance fee is $31.18 per vehicle—that goes to CARB, not us. You’ll pay that as part of the process. What you’re getting in return is proof that your truck meets California’s heavy-duty emissions standards and the ability to renew your registration without a hold.
San Gabriel has a high concentration of smaller trucking operations and owner-operators who can’t afford to have a truck sitting idle for days. Traditional manual inspections used to take one to three hours per vehicle. The OBD-based Clean Truck Check process cuts that time significantly, which is why we can move trucks through faster without sacrificing accuracy.
Right now, testing is required twice a year. Starting in October 2027, it goes to four times a year for OBD-equipped vehicles. That’s not a scare tactic—it’s in the regulation. If you’re planning your maintenance and compliance schedule for next year, factor that in now. The earlier you build it into your routine, the less it disrupts your operation when the change hits.
If your truck has a 2013 or newer model year engine and a gross vehicle weight rating over 14,000 pounds, it’s not optional. CARB requires you to complete emissions compliance testing twice a year right now, and that increases to four times a year starting in October 2027.
This applies whether you’re based in California or out of state—if you operate here, you’re subject to the rule. Miss a test and CARB can flag your vehicle, which triggers a DMV registration hold. That means you can’t renew your registration until you submit a passing test.
You’ll also risk being denied access to ports, freight terminals, and certain work zones that verify compliance before letting trucks in. Fines can go up to $10,000 per vehicle per day for non-compliance. It’s not a gray area—if your truck meets the criteria, you need to be tested on schedule.
CARB tracks compliance through the CTC-VIS database. When your truck is due, they’ll send a notification to the address on file with the DMV. You’ll have a window to complete the test, and if you miss it, they’ll flag your vehicle and notify the DMV to place a registration hold.
The safest approach is to track your own schedule. After each test, you’ll receive documentation with your next due date. Set a reminder 30 days before that date so you’re not scrambling at the last minute.
If you’re not sure whether your truck has been flagged or when your last test was completed, you can check the CARB database or call them directly. But once you’re flagged, you only have 30 calendar days to submit a passing test before penalties start adding up. Don’t wait for the notice—stay ahead of it.
If your truck fails, the OBD system will show which part of your emissions system isn’t performing to standard. That could be a sensor issue, a problem with your diesel particulate filter, an EGR valve malfunction, or something else in the emissions control setup.
You’ll have 30 days from the date CARB flagged your vehicle to get the issue fixed and submit a passing test. During that time, your registration hold stays in place, which means you can’t renew until you’re compliant.
We don’t perform repairs, but we’ll tell you exactly what the system flagged so you can take it to a qualified diesel mechanic who can diagnose and fix the problem. Once the repair is done, come back for a retest. If it passes, we upload the results immediately and your hold clears within hours. Don’t ignore a failed test—every day you wait tightens the timeline and increases the risk of fines or operational shutdowns.
You can get tested at any CARB credentialed facility in California. The results upload to the same statewide database no matter where you go, so location flexibility is built into the system.
That said, if you’re based in or around San Gabriel, testing locally saves you time and fuel. You’re not driving an hour out of your way to get compliant, and if you need a retest or have a question about your next due date, you’re working with a facility that’s easy to get back to.
Some operators use mobile testing services that come to their yard. That can work if you’ve got multiple trucks and want to minimize downtime. But mobile services aren’t always available on short notice, and if there’s an issue with the test equipment or upload, you’re waiting for them to come back. Testing at a fixed location gives you immediate confirmation and documentation in hand before you leave.
The state compliance fee for 2025 is $31.18 per vehicle. That’s a CARB fee, not something we set. On top of that, you’ll pay the testing facility’s service fee, which covers the credentialed tester’s time, the certified OBD equipment, and the upload to the CTC-VIS database.
Pricing varies by facility, but you should expect a straightforward fee structure with no surprise add-ons. If a facility is quoting you different prices depending on the day or trying to upsell other services during the test, that’s a red flag.
What you’re paying for is compliance documentation that clears your DMV hold and keeps your truck legally operating in California. That’s worth a lot more than the test fee when you consider the alternative—fines, registration blocks, and lost revenue from a truck that can’t work. Budget for twice-a-year testing right now, and plan for four times a year starting in 2027. It’s a cost of doing business in California, and it’s not going away.
If your truck doesn’t meet both criteria—2013 or newer model year engine and over 14,000 pounds GVWR—it’s not subject to the Clean Truck Check program. You won’t be flagged by CARB for this specific compliance requirement.
That doesn’t mean your vehicle is exempt from all emissions testing. Depending on your truck’s weight class and age, you may still need a traditional smog check under California’s other programs. But the Clean Truck Check with OBD testing and semi-annual reporting is specifically for newer, heavier trucks.
If you’re not sure whether your truck qualifies, check your registration or call CARB directly. Don’t assume you’re exempt just because you haven’t been flagged yet—enforcement is ramping up, and out-of-state trucks operating in California are being added to the compliance pool starting in 2025. If you do fall under the program and you’re not testing, you’re operating on borrowed time before the state catches up with you.
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