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San Marino runs on high-value work. The contractors, haulers, and equipment operators servicing the city’s estate properties and renovation projects can’t afford a truck sitting idle over a compliance issue. A DMV registration hold doesn’t send a warning it just stops your vehicle from operating legally, and every day it’s unresolved is a day you’re not on the job.
The San Gabriel Valley sits between two of Southern California’s busiest freight corridors the I-10 to the south and the I-210 to the north. CARB deploys roadside emissions monitoring devices on both, and if your truck gets flagged, you’re looking at a 30-day window to respond. Operators running routes through this corridor get caught off guard more often than you’d think, especially if they assumed the program didn’t apply to them.
When your test is done through All SMOG Motors, results go directly to CARB’s CTC-VIS database the moment the scan is complete. No portal logins, no manual uploads, no chasing confirmation. Your compliance record updates immediately, and you can get back to what you were doing before the deadline became a crisis.
All SMOG Motors isn’t a general smog shop that added heavy-duty testing to the menu. Every test we perform is on the exact vehicle population CARB’s Clean Truck Check program targets model year 2013 or newer, GVWR over 14,000 pounds. That’s the whole scope of what we do, which means our testers, equipment, and process are purpose-built for this specific compliance requirement.
Our testers hold CARB-issued HD I/M credentials completed through CARB’s official training course, verified on their public database, and renewed on schedule. We use CARB-certified OBD testing devices, not generic diagnostic tools, because the equipment matters when it comes to whether your result is accepted by the system.
We serve Los Angeles County and Riverside County, which puts San Marino, the surrounding San Gabriel Valley cities, and every freight corridor connecting them squarely in our service area. If your trucks are working the I-10 or I-210 corridors or pulling into San Marino’s residential streets to service a renovation or deliver to the Huntington Library we’re the tester you want on call.
The first step is scheduling, and because San Marino has no commercial or industrial staging areas within the city itself, mobile testing is usually the practical answer. We come to your location your yard in San Gabriel, your staging area in Arcadia, or wherever your trucks are parked so you’re not losing a workday driving to a fixed station.
Once on-site, we connect CARB-certified OBD testing equipment directly to your vehicle’s diagnostic port. The scan reads your truck’s onboard emissions data and confirms whether the system is operating within CARB’s required parameters. This process is specific to model year 2013 and newer heavy-duty vehicles with a GVWR over 14,000 pounds if your truck doesn’t meet both thresholds, it’s not subject to the Clean Truck Check program, and we’ll tell you that upfront.
After the test, we submit results electronically to CARB’s CTC-VIS database immediately. You don’t touch the portal. You don’t upload anything. Your compliance record is updated in real time, and your certificate is available for download. For fleet operators managing multiple vehicles across the San Gabriel Valley, that direct submission is the part that saves the most headache.
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California’s Clean Truck Check program applies to any qualifying truck operating on California public roads regardless of where it’s registered. If you’re running an out-of-state truck on loads through the San Gabriel Valley, including deliveries into San Marino, you’re subject to the same semi-annual testing requirement as any California-registered vehicle. This catches interstate operators off guard more than almost anything else in the program.
In 2025, qualifying trucks require two passing tests per year. That cadence is scheduled to increase to four tests per year by October 2027. The annual CARB compliance fee is $31.18 per vehicle, separate from the tester’s service charge. Non-compliance carries fines of up to $10,000 per vehicle per day and for operators running multiple trucks on San Marino renovation projects or freight routes through Los Angeles County, that exposure compounds fast.
Every test we perform includes the OBD scan using CARB-certified equipment, direct electronic submission to CTC-VIS, and a compliance certificate confirming the result. There’s no ambiguity about whether the submission went through, because we handle it directly. If you’ve received a Notice to Submit to Testing, that 30-day window is real and we can schedule quickly enough to keep you well inside it.
Yes if your truck is model year 2013 or newer and has a GVWR over 14,000 pounds, it’s subject to California’s Clean Truck Check program regardless of what kind of work you’re doing or where in the state you’re doing it. San Marino’s high-end residential construction and renovation market brings in a steady stream of contractors, haulers, and equipment operators from surrounding cities like San Gabriel, Alhambra, and Arcadia. Many of those operators are running exactly the trucks this program targets.
The compliance requirement follows the vehicle, not the job type. So whether you’re hauling demolition debris from a San Marino estate renovation, delivering materials to a jobsite off Huntington Drive, or running grounds maintenance equipment for a large-lot property, if the truck meets both thresholds, you need to be tested. Two passing tests per year are required in 2025, and that increases to four per year by October 2027.
A failed Clean Truck Check doesn’t automatically mean your truck is done but it does mean you have a compliance gap that needs to be addressed before your record clears. CARB tracks test results through the CTC-VIS system, and a failed result without a follow-up passing test will eventually trigger enforcement action, which can include a DMV registration hold and fines of up to $10,000 per vehicle per day.
The most common reason trucks fail the OBD scan is a fault code or emissions-related system issue flagged by the vehicle’s onboard diagnostics. That’s a repair issue, not a testing issue once the underlying problem is fixed, the truck can be retested. The important thing is not to let a failed result sit unresolved. If you’re operating in Los Angeles County and your truck is flagged, the window to get back into compliance is finite. The sooner you address it, the less exposure you carry.
Yes, and this is one of the most misunderstood parts of the program. California’s Clean Truck Check requirement applies to any qualifying vehicle operating on California public roads the state where the truck is registered doesn’t matter. If you’re based in Nevada, Arizona, Texas, or anywhere else and your routes bring you through Los Angeles County, including the I-10 corridor that runs just south of San Marino, you’re subject to the same semi-annual testing requirement as any California-registered truck.
CARB’s roadside emissions monitoring devices don’t check registration they scan emissions signatures from passing vehicles and flag trucks that appear to be running outside acceptable parameters. If your out-of-state truck gets flagged and you receive a Notice to Submit to Testing, you have 30 days to respond. We test non-California-registered vehicles and submit results directly to CTC-VIS, so your compliance record gets updated the same way it would for any other qualifying truck.
In 2025, qualifying trucks model year 2013 or newer with a GVWR over 14,000 pounds are required to pass two Clean Truck Check tests per year. That’s semi-annual testing, meaning you need a passing result roughly every six months to stay in continuous compliance. CARB does allow tests to be submitted up to 90 days before a compliance deadline, so there’s some flexibility in how you time them around your operational schedule.
What’s worth planning for now is that the testing frequency is going up. Starting in October 2027, most qualifying trucks will be required to test four times per year quarterly. For fleet operators managing multiple vehicles across the San Gabriel Valley, that’s a significant increase in the compliance workload. Building a relationship with a credentialed tester now, before the cadence escalates, makes the transition a lot smoother than scrambling to find availability when everyone else is in the same situation.
They’re two separate programs with different vehicles, different equipment, and different databases. A standard smog check the kind required for passenger car registration renewal tests tailpipe emissions using a dynamometer and emissions analyzer. It applies to most gasoline-powered passenger vehicles and light-duty trucks registered in California.
The CARB Clean Truck Check is an OBD-based test designed specifically for heavy-duty diesel vehicles model year 2013 or newer, GVWR over 14,000 pounds. Instead of testing tailpipe output directly, it reads the vehicle’s onboard diagnostic system to confirm the emissions controls are functioning correctly. Results are submitted to CARB’s CTC-VIS database, which is entirely separate from the DMV smog system. A shop that does standard smog checks is not automatically qualified to perform a Clean Truck Check the tester needs a CARB-issued HD I/M credential and CARB-certified OBD equipment. Those are two different things, and it’s worth confirming before you book.
Yes, and for most operators working in or around San Marino, mobile testing is the only realistic option. San Marino is a fully residential city there are no truck yards, fleet depots, or commercial staging areas within its boundaries. Contractors and haulers servicing the city’s estate properties and renovation sites are typically based in San Gabriel, Arcadia, Alhambra, or elsewhere in the San Gabriel Valley. Driving a heavy-duty truck across the valley to a fixed testing station means losing hours of productive work time.
All SMOG Motors comes to your location your yard, your depot, or your jobsite with CARB-certified OBD equipment ready to test on-site. The scan is performed at your vehicle, we submit results directly to CTC-VIS from the field, and you have your compliance certificate without ever leaving your base of operations. For fleet operators managing multiple vehicles, on-site testing also means you can run through several trucks in a single visit rather than coordinating separate trips for each one.
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