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Your truck stays on the road making money instead of sitting at a testing station. That’s the difference between losing a day’s revenue and keeping your operation moving.
California requires semi-annual Clean Truck Check testing for diesel trucks model year 2013 or newer with a GVWR over 14,000 pounds. Miss that window and the DMV puts a registration hold on your vehicle. You can’t renew. You can’t legally operate. And if you’re caught running non-compliant, fines start at $10,000 per vehicle per day.
We bring the test to you. Your yard, your job site, wherever your truck is parked in Bell Gardens. The OBD test takes 15 to 30 minutes. Results go straight to the CARB database. Your compliance status updates immediately. The DMV lifts any holds. You get back to work.
All SMOG Motors focuses exclusively on 2013 and newer diesel trucks. That’s it. We’re not trying to be everything to everyone. We’re CARB credentialed testers who understand OBD systems, know the CTC-VIS database inside out, and work with Bell Gardens trucking operators daily.
Bell Gardens sits in the heart of LA County’s trucking corridor. Transportation and warehousing employ over 1,800 people here. Most operators run one or two trucks. You don’t have time for compliance headaches or waiting in line at a testing station.
We’re insured, which most mobile testers aren’t. We carry TSA clearance for port and airport work. And we show up when we say we will.
You call or text with your truck’s year, make, and VIN. We confirm it’s a 2013 or newer diesel over 14,000 pounds GVWR. Then we schedule a time that works for you.
We arrive at your location in Bell Gardens with CARB-certified OBD testing equipment. The test plugs into your truck’s diagnostic port and reads emissions data directly from the engine computer. No tailpipe test. No dynamometer. Just a quick electronic check that takes 15 to 30 minutes in most cases.
Once the test completes, we upload results to the CARB CTC-VIS system right there. You get documentation immediately. CARB updates your compliance status. If you had a DMV registration hold, it lifts automatically within the system. You’re legal and ready to roll.
If your truck doesn’t pass, we tell you what codes came up and what likely needs attention. You handle the repairs, then we come back and retest.
Ready to get started?
This isn’t a regular smog check. California’s Clean Truck Check program applies specifically to heavy-duty diesel vehicles—trucks and buses with a GVWR above 14,000 pounds, model year 2013 or newer, operating in California. If your truck meets those criteria, you need this test twice a year.
You’re paying for a CARB credentialed tester who’s completed official training and passed the state exam. You’re paying for certified OBD testing equipment that meets CARB specifications. And you’re paying for the convenience of mobile service that comes to you anywhere in Bell Gardens instead of you hauling your truck somewhere and waiting.
The test itself checks your engine’s onboard diagnostics for emission-related fault codes and monitors. If everything checks out, you pass. Results transmit electronically to CARB’s database in real time. That instant upload is critical because it’s what clears your compliance status and lifts any DMV holds.
Bell Gardens has a high concentration of small trucking operators. One or two trucks. Maybe a few more. For you, a single day of downtime costs $500 or more in lost revenue. Mobile testing eliminates that loss.
Your truck needs Clean Truck Check testing if it meets three criteria: it’s a diesel engine, it’s model year 2013 or newer, and it has a gross vehicle weight rating over 14,000 pounds. All three have to apply.
If your truck is older than 2013, this program doesn’t cover it. If it’s under 14,000 pounds GVWR, it doesn’t apply. And if it’s not diesel, you’re not required to test under this program.
The testing requirement is semi-annual, meaning twice per year. Starting October 2027, it increases to quarterly for OBD-equipped vehicles. California’s DMV will place a registration hold on your vehicle if you don’t maintain compliance, and you’ll receive notices from CARB if you’re flagged by roadside monitoring or fall out of compliance.
If your truck fails, the OBD system flagged emission-related fault codes or monitors that aren’t ready. We give you documentation showing exactly what codes came up so you know what needs repair.
You’ll need to take your truck to a diesel mechanic who can diagnose and fix the issue. Common failures include faulty sensors, DPF problems, or SCR system issues. Once repairs are complete, you schedule a retest with us.
You have 30 days from the date of a Notice to Submit to Testing to get a passing result uploaded to CARB. If you miss that deadline, penalties start piling up fast. Registration holds stay in place until you pass, and operating a non-compliant vehicle can result in fines up to $10,000 per day per vehicle.
Yes. That’s the entire point of mobile testing. We come to wherever your truck is parked—your business, your yard, a job site, even your home if that’s where you keep it.
All we need is access to the truck and about 20 minutes of your time. The test happens on-site using portable CARB-certified equipment. We don’t need special facilities or hookups.
Bell Gardens is our service area, so we’re familiar with local businesses, trucking yards, and the industrial areas where most operators keep their rigs. Mobile testing saves you the hassle of driving to a station, waiting in line, and losing half a day of work. Your truck stays put. We come to you.
The actual OBD test takes about 15 to 30 minutes in most cases. It’s not a long process. We plug into your truck’s diagnostic port, the equipment reads data from the engine computer, and we get a pass or fail result.
The total time from when we arrive to when we leave is usually under 45 minutes, including paperwork and uploading results to the CARB database. That’s significantly faster than driving your truck to a testing location, waiting for your turn, getting tested, and driving back.
If your truck has issues that prevent the test from completing—like monitors that aren’t ready or communication problems with the OBD port—it might take a few extra minutes to troubleshoot. But in straightforward cases with trucks that are maintained properly, you’re looking at a quick in-and-out service.
Your truck needs to be in normal operating condition. The engine should be warmed up, and all emission control systems should be functioning. If your check engine light is on, that’s an automatic fail, so get that addressed before scheduling a test.
Make sure your OBD monitors are ready. If you recently cleared codes or disconnected the battery, the monitors might not be set, and the test won’t complete. Drive the truck through a normal duty cycle—city and highway driving—to allow monitors to reset.
Have your vehicle registration or VIN handy when we arrive. We need accurate information to upload results to the correct vehicle record in the CARB system. Other than that, just make sure we can access the truck and the OBD port, which is usually inside the cab near the steering column.
Pricing varies depending on your specific situation, but mobile testing typically costs more than driving to a station yourself. You’re paying for convenience and the elimination of downtime.
Think about it this way: if your truck earns $500 to $1,000 per day and you lose half a day going to a testing station, the real cost isn’t just the test fee. It’s the lost revenue, the fuel to get there, and your time. Mobile testing removes all of that.
We provide upfront pricing when you call. No surprises. And if you operate multiple trucks in Bell Gardens, we can discuss fleet pricing that makes semi-annual testing more manageable. The goal is keeping your trucks compliant without disrupting your operation or cutting into your income.
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