Check Out Our Reviews!
You’re running a business, not a compliance department. But California doesn’t care about your schedule. Miss a Clean Truck Check deadline and you’re looking at DMV registration holds that ground your trucks. Keep ignoring it and CARB can hit you with fines up to $10,000 per vehicle per day.
That’s not a scare tactic. That’s the regulation as of October 2024, and enforcement is real. CARB uses roadside monitoring and license plate readers to flag high emitters. If your truck gets flagged, you’ll receive a Notice to Submit to Testing, and the clock starts ticking.
We handle CARB emissions testing for heavy-duty trucks with 2013 or newer diesel engines over 14,000 pounds GVWR. Your truck gets scanned using certified OBD testing equipment. Results go straight to CARB. You get documentation proving compliance. Your registration stays clean, your trucks stay operational, and you avoid the kind of penalties that can sink a small fleet.
This isn’t about passing inspection for the sake of it. It’s about protecting your ability to operate in California without interruption.
All SMOG Motors is a CARB credentialed testing facility serving Monterey Park and the surrounding Los Angeles County area. We’re certified to perform Clean Truck Check testing using equipment that meets California Air Resources Board specifications. Our testers have completed CARB’s online training course and passed the required exam.
We don’t test every type of truck. We focus exclusively on 2013 and newer diesel engines over 14,000 pounds GVWR because that’s where OBD testing applies. If your truck doesn’t fit that profile, we’ll tell you upfront. We’re not here to waste your time or ours.
Monterey Park sits in the heart of LA County’s logistics corridor. Trucks move through here constantly, and most fleet operators we work with are dealing with tight schedules and even tighter margins. We get it. That’s why our process is built around speed and accuracy, not upselling services you don’t need.
You bring your truck in. We plug into the OBD port and run a scan using CARB certified testing equipment. The scan pulls data directly from your engine’s onboard diagnostics system. We’re checking emissions performance against the standards CARB sets for your truck’s model year and engine type.
The test itself takes minutes, not hours. Once the scan is complete, results are transmitted directly to CARB through their system. You get documentation showing your truck passed and met the compliance requirement. That record goes into the CTC-VIS database, which the DMV checks before processing registration renewals.
If your truck fails, we’ll tell you why and what needs attention. You can submit a test up to 90 days before your compliance deadline, which gives you time to address any issues and retest without risking a registration hold. We offer 50% off retests if your vehicle doesn’t pass the first time.
You don’t need an appointment for most tests, but calling ahead helps if you’re bringing multiple trucks or need to work around a specific schedule. We’re set up to handle both independent owner-operators and larger fleets running through Monterey Park.
Ready to get started?
You’re paying for a CARB credentialed tester to scan your truck’s OBD system using certified equipment and submit results directly to the state. That’s it. No diagnostic work, no repairs, no add-ons unless your truck actually needs them.
Here’s what’s included: OBD emissions scan for 2013+ diesel engines over 14,000 pounds GVWR, direct result transmission to CARB’s CTC-VIS system, printed compliance documentation for your records, and guidance on what to do if your truck doesn’t pass. If you fail, you get 50% off the retest once repairs are complete.
Testing frequency matters. Right now, most heavy-duty trucks need testing twice a year. Starting in October 2027, OBD-equipped vehicles will need testing four times a year. That’s not our rule. That’s CARB’s timeline, and it’s worth planning for now if you’re managing a fleet.
Los Angeles County has some of the strictest enforcement in the state. CARB collected over $21 million in penalties in 2022, and a significant portion came from commercial operators in the LA area who missed deadlines or ignored compliance requirements. Monterey Park is centrally located in a high-traffic zone, which means your trucks are more likely to get flagged during roadside checks if they’re not current on testing.
Yes, if it operates in California. CARB’s Heavy-Duty Inspection and Maintenance program applies to all diesel and alternative fuel trucks over 14,000 pounds GVWR that operate in the state, regardless of where they’re registered.
That includes trucks based in Nevada, Arizona, Oregon, or anywhere else that cross into California for deliveries, pickups, or transit. If your truck operates here regularly, it needs to comply with California emissions testing requirements.
Out-of-state operators often miss this until they get flagged at a weigh station or receive a Notice to Submit to Testing in the mail. At that point, you’re on a deadline. The smarter move is to get tested before CARB finds you, especially if you’re running regular routes through LA County.
You can submit a test up to 90 days before your compliance deadline. That window exists specifically to give you time to address any issues if your truck fails and needs repairs before retesting.
Most fleet operators we work with in Monterey Park test 30 to 60 days out. That’s enough buffer to handle failures without scrambling, but not so early that they forget to follow up. If you’re managing multiple trucks with staggered deadlines, planning ahead makes a big difference.
Testing early also protects you from last-minute surprises. If your truck fails close to the deadline and repairs take longer than expected, you risk a registration hold. Once the DMV blocks your registration, that truck is grounded until you submit a passing test. Early testing eliminates that risk entirely.
You’ll get a report showing what triggered the failure. Most failures are related to emissions system malfunctions, sensor issues, or problems with the diesel particulate filter or exhaust components. The OBD scan identifies exactly what’s out of spec.
From there, you’ll need to get the issue repaired. We don’t do repairs ourselves, but we can point you toward what needs attention based on the scan results. Once repairs are complete, bring the truck back for a retest. We offer 50% off retests for vehicles that failed their initial Clean Truck Check with us.
You can’t register or renew registration on a truck that failed and hasn’t been retested. The DMV will see the failed result in CARB’s system and block the transaction. If you’re close to your compliance deadline when you fail, get repairs done immediately. Waiting can ground your truck and cost you more in lost revenue than the repair itself.
No. Our Clean Truck Check service is specifically for diesel trucks with a gross vehicle weight rating over 14,000 pounds and model year 2013 or newer. Those are the vehicles that require OBD-based emissions testing under CARB’s current regulations.
Trucks under 14,000 pounds fall under different smog check requirements, and we don’t handle those. Trucks older than 2013 may require smoke opacity testing instead of OBD testing, which is a different process entirely. If your truck doesn’t fit the 2013+ and 14,000+ GVWR criteria, this service doesn’t apply.
We’re upfront about that because testing the wrong vehicle wastes your time and ours. If you’re not sure whether your truck qualifies, call us with the year, make, model, and GVWR. We’ll tell you right away whether you need this test or something else.
Pricing varies depending on the truck and testing requirements, but most OBD-based Clean Truck Check tests are straightforward and affordable compared to the cost of non-compliance. We’re talking about a couple hundred dollars for testing versus thousands in potential fines or lost revenue from a grounded truck.
CARB estimates annual compliance costs per vehicle can range from $2,500 to $4,500 when you factor in testing, potential repairs, and administrative time. Our testing fee is a small fraction of that total, and it’s the one cost you can’t avoid if you want to operate legally in California.
If your truck fails and needs a retest after repairs, we offer 50% off the retest. That keeps your total testing cost reasonable even if you don’t pass the first time. Call us for current pricing specific to your truck and situation.
Most of the time, you can get tested the same day without an appointment. OBD testing is fast, and we keep our process efficient so you’re not sitting around waiting. That said, calling ahead is always smart, especially if you’re bringing multiple trucks or need to hit a specific time window.
If you’re managing a fleet, we can schedule a block of time to run through several vehicles back to back. That minimizes downtime and keeps your trucks moving. Independent owner-operators usually just show up, but a quick call confirms we’re ready for you.
Monterey Park’s central location in LA County makes us easy to reach whether you’re coming from downtown, the San Gabriel Valley, or further east. We’re set up to handle high volume without sacrificing accuracy, and we’re not interested in dragging out a process that should take minutes.
Local Resources
Useful Links
Other Services we provide in Monterey Park
