Fast Mobile Testing Service—Licensed & Insured
by Mobile Smoke Check & CARBtrax.com

(888) 216-2051

Ensure Your Truck or Motorhome is CARB Compliant

Mobile Clean Truck Check Testing Services.
We Come to You
Anywhere in California.

Clean Truck Check
CTC 90-Day Window Calculator
Big Truck

We Do Big Trucks and Not So Big Trucks

We Do Lots of Motorhomes

We CTC Motorhomes

Certified Ally of Clean Truck Check Tester Alliance™

Certified Clean Truck Check Tester Alliance
Click to verify

Your On-Demand CARB Compliance Solution

We’re your mobile solution for CARB compliance. Our team of licensed, insured, and certified technicians brings the Clean Truck Check directly to you, saving you time and hassle.

  • Mobile & Convenient
  • Expert Technicians
  • State-of-the-Art Equipment
  • Fully Licensed & Insured
  • Comprehensive Support
  • Transparent & Upfront Pricing
  • Quick & Efficient Testing
  • Proven Track Record
  • Free Retest if Your Vehicle Fails
  • Flexible Scheduling Options
  • Assistance with DMV Holds & Registration Issues
  • CARB-Certified Testing Equipment
  • Detailed Compliance Reports Submitted Directly to CARB

 

How Much Does It Cost?

Registration Hold

CARB CTC-VIS
$ 0
00
This is a free service
  • CTC-VIS fees paid on your behalf
  • 1 year CARB alert monitoring
  • CARB Vehicle Compliance Certificate
  • We'll enter your vehicle into CARB
Motorhome

Clean Truck Check

Standard CTC
$ 45
00*
Starting from
  • OBD Clean Truck Check
  • Non-OBD Opacity CTC
  • Visual Inspection for Alt Fuel
  • Free Retest*
Popular

Co-Entity Admin

CTC-VIS by CARBtrax
$ 8
00*
Yearly
  • CARB compliance assured
  • Paid CTC-VIS Compliance fees
  • CARB Alerts Monitored
  • Discounted Clean Truck Checks
Fleets

California's Clean Air Agency

CARB is charged with protecting the public from the harmful effects of air pollution and developing programs and actions to fight climate change. From requirements for clean cars and fuels to adopting innovative solutions to reduce greenhouse gas emissions, California has pioneered a range of effective approaches that have set the standard for effective air and climate programs for the nation, and the world.

CARB’s mission is to promote and protect public health, welfare, and ecological resources through effective reduction of air pollutants while recognizing and considering effects on the economy. CARB is the lead agency for climate change programs and oversees all air pollution control efforts in California to attain and maintain health-based air quality standards.

Clean Truck Check (HD I/M) Information

Mobile Smoke Check

CMSC Logo

California Mobile Smoke Check is comprised of CARB trained compliance testers and inspectors who have met regulatory requirements to be credentialed for the Clean Truck Check program, formerly known as “Heavy-Duty Inspection and Maintenance.” 

Our staff are highly proficient in opacity measurements of diesel vehicles greater than 14,000 pounds using SAE’s stabilized J1667-201802 standard for instrumentation and describes the algorithm we use for the measurement and quantification of exhaust smoke produced during the test.

Our opacity test equipment is the same the government uses and conforms to SAE J1667 specifications under declaration of compliance with the CARB mobile source enforcement branch. By using the latest compliant test instruments utilizing the light extinction principle where a beam of light is attenuated by smoke through scattering and absorption, the analyzed data is measured to produce an accurate Clear Truck Check report for you and the state of California.

Immediate Test Results!

Our Mobile Clean Truck Check Services

We do Heavy & Light Duty Trucks and Motorhomes.
OBD and Opacity!

I should have call Mobile Smoke Check

No Waiting!
Get your emissions report on the spot!

Step 1

Truck Precondition

Your truck should be warmed-up under load for at least 15 minutes to ensure proper test conditions verified by water and oil temperature gauges.

Step 2

Truck Safety Check

Your truck will be prepared for testing and includes a safety check. An inspection for exhaust leaks is performed to prevent erroneous test results.

Step 3

Equipment Setup

Ambient air is measured and correction factors are generated. Calibration and correction factors are set per manufacturer's specifications and set-up procedures.

Step 4

Execution & Validation

Execution of cycle testing is correlated to validation criteria for zero shift deviation values and 3-cycle average opacity and density. If criteria are not met, recheck previous steps and repeat test sequence.

Step 1

Truck Precondition

Your truck should be warmed-up under load for at least 15 minutes to ensure proper test conditions verified by water and oil temperature gauges.

Step 2

Truck Safety Check

Your truck will be prepared for testing and includes a safety check. An inspection for exhaust leaks is performed to prevent erroneous test results.

Step 3

Equipment Setup

Our VIC provides galvanic isolation between your truck and our computer and is established with proper protocol and driver. WAN network link is established. Vehicle and tester credentials are captured and entered.

Step 4

Execution & Validation

CARB compliant Clean Truck Check HD I/M OBD scanner begins emissions data acquisition from truck. Data is formatted to create an encrypted snapshot that is uploaded to CARB for Pass/Fail data analysis.

TL;DR

It’s a pretty picture — green grass, shade trees, and a beautiful sunny blue sky with some wispy clouds. Best of all, the air is sparkling clean and fresh like after a rain shower. Absolutely perfect for a picnic to take in and enjoy California at its best!

California’s Air Resources Board “CARB” oversees all air pollution control efforts in California to attain and maintain health-based air quality standards. To that end, diesel trucks are required to comply with emission standards in order to haul freight. You need to have a Clean Truck Check twice a year to be in compliance.

Our double swirl logo backstory: Logo Backstory, click to read

TL;DR

call today
For a Free Quote
(888) 216-2051

760 E Francis St #L, Ontario, CA 91761

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"Clean Truck Check"

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Mobile Smoke Check

Is an ally certified by the
Clean Truck Check Tester Alliance™

Elite Standards. Verified Experts. Trusted Results

What This Badge Represents:

Credentialed by CARB (California Air Resources Board) – An ally must have at least 2 years of active credentialing with CARB, ensuring they have proven expertise in state emissions regulations and testing requirements.

Must Be Licensed & Insured – The ally must hold a valid business license and carry a minimum of $2,000,000 in liability insurance, including a Mobile Service Rider for fieldwork coverage.

Proven Experience – Ally requires a minimum of 250 Clean Truck Checks, ensuring extensive hands-on knowledge.

Opacity with Visual Inspection (OVI) Specialists – At least 50 OVI inspections have been completed, reinforcing the ally’s expertise in emissions compliance.

Expertise in On-Board Diagnostics (OBD) Testing – Allies specialize in non-continuous connected OBD testing, ensuring thorough system monitoring and accurate reporting.

Deep Knowledge of CARB Regulations & State Statutes – Every alliance ally stays up to date with the California Air Resources Board (CARB) requirements and state-specific emissions laws to guarantee compliance.

Strict Vetting & Ongoing Compliance – Becoming an ally isn’t automatic. Every tester undergoes a rigorous screening process, background verification, and periodic audits to ensure continued excellence.

Commitment to Industry Standards – We enforce the highest levels of accuracy, transparency, and integrity, ensuring fleets and owner-operators receive dependable results.

Not Every Tester Qualifies—Only the Best.

This alliance is reserved for professionals who demonstrate leadership in emissions testing, uphold strict ethical standards, and contribute to a cleaner environment. When you choose a tester displaying this badge, you’re selecting a trusted professional backed by a network of the most qualified and experienced Clean Truck Check testers in the industry.

Have A Registration Hold?

DMV CARB

If DMV is holding back your registration because you need "Proof of Compliance." We Can Fix It Right Now.

EEO & DEI Policy

SCMDSC is an Equal Opportunity Employer

SCMDSC is committed to equal opportunity and non-discrimination for all employees, applicants, and subcontractors. We believe in fostering a diverse and inclusive workplace, free from discrimination.

What this means in practice:

  • Merit-based decisions: We assess everyone based on their qualifications and abilities, without considering factors like race, religion, gender, or age.
  • Reasonable accommodations: We recognize that people work differently and may need adjustments, like technology or flexible processes, to perform their best.
  • Equal treatment: This policy applies throughout your time at SCMDSC, from recruitment and hiring to promotions, benefits, training, and even termination.

Fairness throughout the employment journey:

At SCMDSC, you can expect fair and objective decisions throughout your employment journey, from the initial application to promotions, compensation, and training opportunities.