Hear from Our Customers
You’re running a business, not studying California regulations. But if your semi truck or heavy-duty diesel isn’t compliant, you’re looking at fines up to $10,000 per year, DMV registration holds, and trucks sitting idle when they should be making money.
CARB compliance isn’t optional for trucks with a GVWR over 14,000 pounds and a model year of 2013 or newer. It’s required twice a year—and eventually four times annually. Miss a test window and your registration gets flagged. Your truck can’t legally operate until you’re back in compliance.
We handle the CARB emissions testing so you don’t have to guess what’s required or waste time tracking down the right facility. You get certified OBD testing, proper documentation, and a clear path to keeping your fleet on California roads without the stress of navigating confusing state requirements.
We focus exclusively on CARB compliance for heavy-duty vehicles in Temple City, CA and the surrounding San Gabriel Valley. We’re not a general smog shop trying to handle everything. We specialize in the testing requirements for 2013 and newer trucks over 14,000 pounds GVWR—the exact vehicles facing California’s strictest diesel emissions standards.
That focus matters because the rules are different for your fleet than they are for passenger cars. You need CARB certified OBD testing equipment, testers who understand heavy-duty diesel engines, and a facility that knows how to process the paperwork correctly the first time.
Temple City sits in the heart of Los Angeles County’s freight corridor. Trucking companies and owner-operators here deal with tight delivery schedules and can’t afford delays from compliance issues. We’re local, we understand the pressure, and we’re set up to get your trucks tested and back on the road fast.
You schedule your appointment or stop by with your 2013 or newer heavy-duty truck. We verify your vehicle qualifies—model year 2013+ and GVWR over 14,000 pounds. If it doesn’t meet both criteria, we’ll tell you upfront because this specific testing doesn’t apply to older or lighter vehicles.
Once confirmed, we connect to your truck’s OBD system using CARB certified testing equipment. The system reads your engine’s emissions data directly. We’re checking that your 2010 or newer engine is operating within California’s clean air standards and that all emissions controls are functioning properly.
The actual test takes under 20 minutes. Total time including paperwork is typically under 30 minutes. You’re not sitting around all day waiting for results.
After testing, you receive your official compliance certificate and documentation. This satisfies CARB requirements, clears any DMV registration holds, and gives you proof of compliance if you’re stopped at a roadside inspection. We also track your testing schedule so you know when your next semi-annual test is due.
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You get a complete CARB emissions test using state-certified OBD equipment designed specifically for heavy-duty diesel engines. This isn’t a visual inspection or a generic scan tool. It’s the official testing protocol California requires for trucks in your weight class and model year range.
Your test results are submitted directly to CARB and the DMV. If you’re dealing with a registration hold, this clears it. If you’re coming up on renewal, this satisfies the emissions requirement so your registration processes without delays.
You also receive documentation you can keep in your truck. During roadside inspections or weigh station stops, having current compliance paperwork matters. It shows you’re operating legally and helps avoid citations or vehicle impoundment.
Temple City’s location near major freight routes—close to the 10, 60, and 605 freeways—means you’re probably moving through or operating in areas with heavy CARB enforcement. Compliance isn’t just about avoiding fines. It’s about keeping your trucks operational in a market where California’s clean truck regulations directly impact whether you can do business.
We track testing windows based on your registration dates. CARB requires testing twice per year, and those windows are tied to when your registration comes due. Miss your window and you’re out of compliance even if your truck is mechanically sound.
Your truck needs CARB compliance testing if it meets two specific criteria: it’s model year 2013 or newer, and it has a gross vehicle weight rating over 14,000 pounds. Both conditions must be true. If your truck is older than 2013 or weighs less than 14,000 pounds GVWR, this particular testing requirement doesn’t apply to you.
California’s Heavy-Duty Inspection and Maintenance program targets newer diesel trucks because they’re equipped with advanced emissions controls and OBD systems that can be tested electronically. Older trucks fall under different rules. Lighter vehicles have their own smog check requirements.
If you’re operating a semi truck, a heavy-duty diesel pickup used commercially, or any commercial vehicle over 14,000 pounds GVWR with a 2013 or newer model year, you’re required to test twice per year. Eventually, that frequency increases to four times annually. The testing windows are based on your DMV registration renewal dates, and missing a window puts your registration on hold.
The actual OBD testing takes less than 20 minutes once your truck is connected to our equipment. We’re reading data directly from your engine’s computer system, so there’s no lengthy inspection process or waiting for machines to warm up.
Total time including paperwork and documentation is typically under 30 minutes. You’re in and out fast because we know your truck sitting in our bay is time you’re not making money.
That’s assuming your truck passes. If there’s an emissions issue or a fault code that prevents compliance, we’ll identify it immediately and explain what needs to be addressed. You’re not going to waste time wondering what’s wrong or getting vague answers. We’ll tell you exactly what CARB is flagging and what your next step is.
If your truck doesn’t pass, you’ll receive a detailed report showing which emissions standards weren’t met or which OBD fault codes triggered the failure. California requires that all emissions control systems are functioning properly and that your engine meets 2010 or newer emissions standards.
You’ll need to get the issue repaired before retesting. Common failures include malfunctioning diesel particulate filters, faulty sensors, or engine problems that trigger check engine lights. The good news is the OBD system tells us exactly what’s wrong—there’s no guessing.
Once repairs are completed, you come back for a retest. After you pass, you receive your compliance certificate and your registration hold is lifted. CARB gives you time to make repairs, but your truck can’t legally operate until it’s compliant. That’s why catching issues early during your testing window matters. You don’t want to discover a problem the day your registration expires.
You can get CARB compliance testing at any certified facility in California—you’re not restricted to Temple City. However, not every smog shop is equipped to handle heavy-duty vehicles over 14,000 pounds GVWR. Most smog stations focus on passenger cars and light trucks. They don’t have the equipment or certification for the OBD testing your 2013+ commercial truck requires.
You need a facility with CARB certified heavy-duty testing equipment and staff trained on diesel emissions systems. That’s a much smaller pool of shops. If you’re based in Temple City or operating in the San Gabriel Valley, going to a local facility that specializes in your vehicle type saves you time and eliminates the risk of showing up somewhere that can’t actually test your truck.
Location matters for convenience, but certification and equipment matter for getting the job done right. You want a shop that does this specific type of testing regularly, not one that handles a heavy-duty truck once every few months and has to figure it out as they go.
Pricing for CARB emissions testing varies by facility, but you’re typically looking at a higher cost than a standard passenger car smog check. Heavy-duty testing requires specialized equipment, more time, and certification specific to commercial vehicles over 14,000 pounds GVWR.
The exact price depends on your truck’s configuration and whether you need any additional documentation or expedited service. It’s worth calling ahead to confirm pricing and make sure we can handle your specific vehicle. Some shops advertise smog checks but aren’t set up for semi trucks or heavy diesels.
What you’re really paying for is staying legal and avoiding much bigger costs. A $10,000 annual fine for non-compliance, a registration hold that keeps your truck off the road, or an impounded vehicle at a CHP inspection—all of those are exponentially more expensive than the testing itself. The test is a known cost you can budget for. The penalties for skipping it aren’t.
Your testing schedule is tied to your DMV registration renewal. CARB requires testing twice per year, and those tests need to happen within specific windows before your registration comes due. If your registration renews in January or July, for example, your testing windows open a few months prior.
You’ll receive notices from the DMV, but it’s your responsibility to get tested on time. Miss your window and your registration goes on hold. Your truck can’t be renewed or legally operated until you’re compliant.
We track testing schedules for our customers so you’re not trying to remember dates or decode CARB notices. If you’re coming up on a testing window, we’ll let you know. The goal is to keep you ahead of deadlines so you’re never scrambling at the last minute or dealing with a registration hold that takes your truck out of service. Plan ahead, test on time, and your fleet keeps moving without interruption.
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