
Clean Truck Check EMISSIONS TESTING
CARB Compliance Test Service In San Diego, CA
Periodic emissions testing service for commercial diesel trucks and diesel motorhomes in all of San Diego County. Recent Heavy-Duty Vehicle Inspection and Maintenance (HD I/M) Regulation guidelines requires more frequent emissions testing for non-gasoline vehicles over 14,000 GVWR. To avoid compliance lapse and registration holds we offer convenient mobile Clean Truck Check emissions testing at your location in San Diego Area.
As a CARB credentialed tester (HD I/M Tester Identification Number IA521084) we provide fast, same day OBD test & inspection service for 2013 and newer vehicles. An OBD test is fast and easy solution for truck owners and we’ll transmit your test results directly to CARB for instant certificate update.

Our Services
- ✅ Mobile Clean Truck Check testing at your location.
- ✅ On demand same day services available.
- ✅ Instant reporting and updating test results using CTC-VIS system.
- ✅ Update vehicle record with CARB and DMV to show compliance.
Our mobile technicians are CARB credentialed testers available for hire and are using certified equipment Nexiq USB-Link 3 and approved software Silver Snap-Tool to test, read and transfer emissions data to Clean Truck Check Vehicle Inspection System (CTC-VIS) database.

Why Choose Mobile Service Over Smog Station?
Because we value your time and business – we adjust to your schedule and your location. It may be hassle and inconvenient to drive your larger fleet vehicles to a smog check test station. We come to you and perform test and inspection onsite at a truck stop, storage yard, at a job site or loading dock. Flexibility and time savings is our priority.
If for any reason your vehicle fails emissions test or it’s not ready for testing, we offer Free Re-Test at a later date.
To pass emissions test it is important that your vehicle does not have Malfunction Indicator Lamp (MIL) or “Check Engine” light being illuminated. Clogged DPF (Diesel Particulate Filter) or when level is near full, or truck has incomplete regeneration cycle, may also cause emissions test to fail.
Heavy-Duty Vehicle Inspection and Maintenance Program implemented by CARB
Starting January 1st 2025 California Air Resources Board HD I/M program will require all commercial vehicles with gross weight over 14,000 pounds to test emission control systems and submit a reading snap shot to CARB database. As this new regulation took affect this year, many business owners got caught by surprise when commercial truck DMV registration renewal was showing incomplete and marked non CARB compliant vehicle. To complete registration renewal requires diesel emissions test: smoke opacity test or OBD reading snap shot.

Save Valuable Time With Our Mobile Emissions Testing Service In All Of San Diego County
✅ We offer convenient Clean Truck Check testing at your location in All San Diego. Doesn’t matter if you need to test one truck or several.
✅ Digital test results data upload provides instant CARB compliance certification and updates DMV truck record.
✅ Mobile service available 7 days a week.
We Test Semi Trucks, Box Trucks, Tow Trucks, Buses, Truck Tractors, Motorhomes and RVs.



What Is Clean Truck Check?
Clean Truck Check Testing is an equivalent to a Smog Check for heavy duty commercial diesel vehicles. It is a program implemented by The California Air Resource Board (CARB) to provide significant reductions in smog-forming and carcinogenic toxic air pollution necessary to achieve federal air quality mandates and healthy air in California’s communities.
The action how the program works are following:
- Periodic commercial vehicle testing requirements,
- Other roadside emissions monitoring techniques,
- Identification of vehicles in need of emissions related repairs,
- Making sure any needed repairs are performed.

Steps To Obtain Clean Truck Check Compliance Certificate In San Diego
- Create owner account at https://cleantruckcheck.arb.ca.gov/
- Add your vehicles and Pay vehicles annual compliance fee.
- Get your vehicle tested by credentialed tester in your area. Call (858) 255-1122
- Pass emissions compliance test and results will be automatically submitted and will show up in your CTC-VIS owners account.
- Your vehicle is now Clean Truck Check Compliant.
Please note if you are trying to get compliance certificate ASAP, keep in mind there are possible delays due to payment processing. Depending on the type of payment you may have to wait 1-7 business days. Credit or Debit card payments takes 1-2 business days. ECheck payments can take up 5-7 business days.
What Are The Requirements To Pass Clean Truck Check Emissions Testing and Inspection?
To successfully pass emissions test and obtain Clean Truck Check certificate vehicles must registered VIN in CTC-VIS database and meet specific requirement before testing can begin.
No Check Engine
Malfunction Indicator Light (MIL) must be off and there should not be any emissions related diagnostic trouble codes in vehicles memory. Pending, Stored Or Permanent.
Monitor Readiness
Readiness monitors determine whether emissions control systems have completed self test necessary to run and check for emissions related faults. Including data like distance traveled, number of warmups and engine run time since the last Check Engine codes cleared.
No Dead Battery
Disconnecting battery or needing to jump start the vehicles will erase OBD data and will clear saved readiness monitor status. You will need to complete multiple drive cycles until truck is ready for testing.
Onsite CTC Provides Clean Truck Check Inspection Service in San Diego, CA
Heavy-Duty Vehicle Inspection and Maintenance compliance testing must be performed by CARB credentialed tester who completed HD I/M training course, passed examination and received CARB Authorized Tester Certification and Tester Identification Number IA521084.
Onsite CTC mobile service available 7 days a week in All San Diego County, Call us (858) 255-1122

How Clean Truck Check Compliance May Affect Your Business?
Unfortunately it is becoming more complex to run transportation and logistics business in California.
Starting in 2025 new truck diesel emissions testing requirements might cause delays and DMV holds on registration and plates renewals. Maintaining active CARB registration will help to minimize down time for your trucks.
Third Party Enforcement
In addition freight facilities, cargo ports, rail-yards, loading and holding facilities and even freight brokers and national vendors are mandated to collect and report. right to request proof of Clean Trucks Check compliance certification or check truck status through California Electronic Greenhouse Gas Reporting Tool (Cal e-GGRT) to grant entry and / or collect and maintain records of all vehicles entering freight facility that are not compliant with Clean Truck Check.
Avoid Delays and Loss of Business
We recommend register your business and create an account login for your company on CTC-VIS portal. Even if you have not received non renewal notice or if your vehicle is not registered in California. Early registration will speed up CARB compliance process in the future.
Past Due Emissions Test Might Impact Your Business.
Having a truck on California highways with past due emissions test is a potential business interuption. If your are picking up loads from Port Of San Diego, Pasha Group, Port Of Long Beach – you may be denied entry if your compliance certificate is expired. Major retail chains like Walmart and Amazon are starting to require their cargo carriers to be up to date and CARB compliant.
Commercial fleet owners or employees of a company may perform in house Clean Truck Check compliance testing on their own vehicles or hire out a credentialed testing company to do it for them. These rules apply to all California registered trucks and out of state vehicles operating withing the state of California. This program requires all commercial diesel, hybrid and alternative fuel vehicles with a Gross Vehicle Weight Rating (GVWR) over 14,000 pounds to be tested semi annually. And starting in 2027 quarterly testing will be mandatory to stay in compliance.
Who is subject to Clean Truck Check Compliance?
All non-gasoline heavy-duty commercial vehicles operating in California with a Gross Vehicle Weight Rating (GVWR) over 14,000 pounds. That includes Diesel, Bio-Diesel, Propane, Natural Gas, Ethanol, Methanol engines.
- Commercial trucks and buses
- Agricultural vehicles
- Transit buses
- Motor Homes for Personal Use
- Motor Homes for Commercial Use
- Hybrid heavy-duty vehicles
Zero tailpipe emissions fuels like Electric and Hydrogen vehicles are excluded.

San Diego CARB Compliance Diesel Testing Station
Mobile on demand CARB compliance diesel testing service. We offer fast and professional Clean Truck Check emissions testing at your location. We come to you, the same or next day, carrying all necessary testing equipment and software to test and update your compliance certificate onsite. Testing available for 2013 year and newer vehicles with OBD J1937 and J1979 connectors.
Contact us with your CARB Compliance questions or to schedule mobile truck emissions testing appointment call (858) 255-1122.
Diesel Particulate Filter (DPF) Regeneration & Emissions Compliance Testing in San Diego
Diesel vehicles over 14,000 pounds are subject to Clean Truck Check testing whether or they are equipped with OBD (On-Board Diagnostics) port or not.
OBD system equipped vehicles, usually it means 2013 and newer diesel engines, are required to undergo a scan of the engine’s emissions OBD data using a California Air Resources Board certified OBD testing device and software.
Diesel vehicles without OBD, meaning 2012 and older diesel engines, are required to test by completing a smoke opacity test and a visual inspection of the emissions control equipment – Vehicle Emissions Control Equipment Inspection.


WE COME TO YOU
We Come To You
We offer all in one mobile CARB compliance testing service. Onsite service at your location – means convenience for your fleet and saving valuable time. Available CTC-VIS account setup assistance.