CARB Compliant Los Angeles & Riverside County, CA

Your Truck Stays Compliant, You Stay Working

Digital emissions testing for 2013 or newer heavy-duty trucks over 14,000 lbs GVWR. We download data from your truck’s ECU, submit results to CARB, and keep you on the road without the registration headaches.

CARB Credentialed Testers Only

Every test is performed by our state-certified credentialed testers using CARB-approved equipment. Your results count because they’re submitted by professionals who meet California’s strict requirements.

Direct CARB Database Submission

We handle the entire CTC-VIS portal process and electronically submit your test results straight to CARB and the DMV. You’re done once we finish the test.

Specialized in 2013+ Trucks

We focus exclusively on OBD-equipped heavy-duty diesel trucks with 2013 or newer engines over 14,000 pounds GVWR. That’s what we know, and we know it well.

CARB Emissions Testing in Los Angeles & Riverside County, CA

What CARB Compliant Testing Actually Means for You

If you’re running a 2013 or newer diesel truck over 14,000 pounds in California, you’re required to pass Clean Truck Check emissions testing. This isn’t the old smoke opacity test. It’s digital. We connect to your truck’s onboard diagnostic system, pull the emissions control data directly from the ECU, and submit it to the state. California mandates this twice a year right now, and that frequency increases to quarterly by 2027. Miss a deadline and the DMV puts a registration hold on your truck. That means no tags, no renewal, and no legal operation until you’re compliant. We make sure that doesn’t happen.

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All Smog Motors

Need a quick estimate?

Stay compliant and keep your trucks on the road with All Smog Motors. We specialize in CARB emissions compliance checks for heavy-duty trucks, making the process simple, fast, and stress-free. Whether you’re up against a registration deadline or received a notice to test, our certified team will handle your inspection accurately and efficiently so you can avoid penalties and costly downtime. Fill out the form below to schedule your compliance check today and keep your fleet moving without interruption.

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Heavy-Duty Vehicle Compliance Los Angeles CA

What You Actually Get from Staying Compliant

This isn't about checking a box. It's about keeping your truck working, avoiding fines, and staying ahead of state enforcement that's only getting stricter.

You avoid DMV registration holds that keep your truck parked and costing you money every single day it sits.

Your test results go straight to CARB and the DMV electronically, so there’s no paperwork you need to track or submit yourself.

You stay ahead of roadside monitoring devices that flag high emitters and trigger 30-day compliance notices you don’t have time for.

You meet the semi-annual testing deadlines without scrambling at the last minute or risking penalties that add up fast.

Your truck keeps earning revenue instead of sitting in a shop or waiting for compliance issues to clear.

You get peace of mind knowing a CARB-credentialed tester handled it right the first time with certified equipment.

California CARB Diesel Compliance Testing

This Service Only Works for Specific Trucks

Let’s be clear about who this applies to. Your truck must have a 2013 or newer model year engine. It must have a gross vehicle weight rating over 14,000 pounds. If your truck is older than 2013 or lighter than 14,000 lbs, this digital OBD testing doesn’t apply to you. Those older trucks require a different type of test that involves smoke opacity and visual inspections. We’re focused on the newer OBD-equipped heavy-duty trucks because that’s where California’s enforcement is tightest and where most commercial operators are running into compliance issues. The state checks your engine model year, not your truck’s model year, so make sure you’re looking at the emissions control label on the engine itself. If you’re not sure whether your truck qualifies, check your GVWR label on the driver’s side door jamb and your engine’s model year before scheduling.

CARB Clean Truck Check Los Angeles & Riverside County, CA

How the Digital Emissions Test Works

This is a straightforward process. SMOG Motors brings CARB-certified OBD testing equipment to your truck. We plug into the diagnostic port, usually a 9-pin J1939 or 16-pin J1962 connector depending on your truck’s make. The device scans your engine’s onboard diagnostic system and pulls emissions control performance data directly from the ECU. It checks whether your diesel particulate filter, NOx sensors, and other emissions components are functioning properly. The scan takes less than five minutes in most cases. Once the data is captured, it’s transmitted directly to CARB’s database through the CTC-VIS portal. You’ll receive confirmation that your test results were submitted, and CARB updates your compliance status. If your truck passes, you’re good until your next deadline. If there’s an issue flagged, we’ll let you know what needs attention before you can retest. The whole point is to confirm your emissions control systems are working as designed, and to do it without taking your truck out of service for hours.

Frequently Asked Questions

Does this CARB compliant testing apply to my older diesel truck?

Only if your truck has a 2013 or newer model year engine and weighs over 14,000 pounds GVWR. If your engine is 2012 or older, you need a different type of test that includes a smoke opacity check and visual inspection of emissions equipment. The digital OBD testing we perform is specifically for trucks with onboard diagnostic systems, which became standard on heavy-duty diesel engines starting in 2013. Check the emissions control label on your actual engine to confirm the model year, because the engine year is often one year older than the truck’s chassis year. If you’re not sure whether your truck qualifies for OBD testing or needs the older style test, we can help you figure that out before you schedule.

How often do I need to get my semi truck tested for CARB compliance?

Right now, most heavy-duty trucks over 14,000 pounds need to be tested twice a year. Your specific deadlines depend on where your truck is registered. If it’s California-registered, your deadlines are tied to your DMV registration renewal date and then six months after that. If you’re registered out of state, your deadlines are based on the last digit of your VIN. You can find your exact due dates in your CTC-VIS account once your truck is registered in the Clean Truck Check system. Starting in October 2027, the testing frequency increases to four times per year for OBD-equipped trucks. That means quarterly testing. California-registered motorhomes and certain agricultural vehicles only test once per year, but commercial trucks don’t get that exception. Missing a deadline triggers a registration hold from the DMV, so it’s worth tracking these dates carefully.

What happens if my truck fails the CARB emissions test?

If your truck fails, it means the OBD scan detected an issue with your emissions control systems. That could be a malfunctioning diesel particulate filter, a problem with your NOx sensors, or another component that’s not operating within CARB’s standards. You’ll need to get the issue diagnosed and repaired, then come back for a retest. The good news is that we can submit passing tests up to 90 days before your compliance deadline, so if you test early and fail, you have time to make repairs and retest before your deadline hits. If you wait until the last minute and fail, you’re at risk of a registration hold. The key is addressing the problem quickly so your truck can get back to compliant status and stay on the road legally.

Do I need to do anything after the test is done?

No. Once we complete your CARB compliant emissions test and submit the results to the state, you’re done. The test data goes directly into CARB’s CTC-VIS database and gets sent to the DMV electronically. You don’t need to file paperwork, mail anything, or log into a portal yourself. We handle all of that. You’ll receive confirmation that your test was submitted and whether you passed or if there’s an issue that needs attention. If you passed, your compliance status is updated in the state system and your truck is good until the next testing deadline. It’s a good idea to keep a record of your test results and compliance certificate in your truck in case you’re ever stopped during a roadside inspection, but California doesn’t require you to carry it. The state and DMV have your status on file.

Can I get CARB testing done if my truck is registered out of state?

Yes. California’s Clean Truck Check program applies to all heavy-duty diesel trucks over 14,000 pounds that operate on California roads, regardless of where they’re registered. If you’re an out-of-state truck running loads into or through California, you still need to be compliant. Your testing deadlines are based on the last digit of your vehicle identification number instead of a DMV renewal date, but the requirements are the same. You’ll need to register your truck in the CTC-VIS system, pay the annual compliance fee, and submit passing emissions tests on schedule. If you’re only in California occasionally, there’s a 5-Day Pass option that lets you operate legally for up to five consecutive days per calendar year without full registration, but if you’re in the state regularly for work, you need to be fully compliant. Enforcement happens at border crossings, weigh stations, and ports, so it’s not something you can skip.

What's the difference between CARB compliance and a regular smog check?

A regular smog check is for light-duty vehicles under 14,000 pounds and typically involves tailpipe emissions measurements and visual inspections. CARB compliance testing for heavy-duty trucks is a completely different program called Clean Truck Check or HD I/M. For trucks with 2013 or newer engines, it’s a digital process where we scan your truck’s onboard diagnostic system to check emissions control performance. There’s no tailpipe sniffer involved. The data comes straight from your engine’s computer. For older trucks with 2012 or earlier engines, the test does include a smoke opacity check, but that’s still not the same as a light-duty smog check. The CARB compliance program is specifically designed for commercial heavy-duty vehicles and has different standards, different testing methods, and different enforcement tied directly to your DMV registration. It’s a state-mandated program under California Air Resources Board regulations, and it’s separate from anything you’d do at a regular smog check station for a passenger car.