clean truck check / Periodic smoke inspection program 

a California Diesel Compliance company

Statewide. Certified. Insured

Statewide Mobile Testing

  • On-Site testing is done when and where you specify to eliminate truck downtime.
  • Proactive Scheduling Service--we contact you when it’s time for your next test, so you don’t have to think about it.
  • Electronic Record Management allows us to specialize in servicing multiple terminal fleets, and fleets that move throughout the state.
  • Electronic Record Management allows you to track your statewide compliance activity at a glance!
  • We manage your records and keep them backed up for security, so that they are always available for you to pass an audit.
  • ​Our testers are Professional, Certified, and Insured

Got Smoke?

Don’t get fined! California Diesel Compliance offers professional, certified and insured service with over 20 years of experience in medium to heavy duty diesel trucks. We will manage your records and let you know when it’s time to schedule your tests so you don’t have to think about it. Our statewide presence gives you a single vendor solution and allows us to guarantee competitive pricing regardless of your company’s California footprint. Because we are mobile, we can service your fleet at anytime including nights and weekends at no additional cost to you.

CONTACT US: 866-519-2850


PSIP: Why Comply?

CARB’s diesel engine regulations and programs cover a wide range of equipment operating in California and are designed to reduce air pollution caused by diesel-powered and other non-gas fossil-fuel powered equipment. Mobile sources including cars, trucks, ships, and off-road equipment continue to contribute a majority of smog-forming NOx and the largest portion of GHG emissions in California. They are also a significant source of toxic air contaminants such as diesel particulate matter (PM) and formaldehyde that directly impact community health. Enforcement of these regulations helps move California closer to our clean-air goals, promotes a level-playing field for compliant businesses and individuals, and supports the health of communities, especially disadvantaged communities most impacted by pollution.


California Air Resource Board requires a semi-annual test for all heavy duty diesel powered vehicles that are over 14,000 GVWR with deadlines based on registration due date.

Under the The Clean Truck Check, a Heavy Duty Inspection Maintenance (OBD reading) is required for all 2013 and newer vehicles.

Under the ​The Periodic Smoke Inspection Program, a Smoke Opacity Test is required for all 2012 and older vehicles

Clean Truck Check

The ARB randomly audits fleets, maintenance, and inspection records. The state of California is serious about clean air and their enforcement division has grown considerably over the last year. Stiff fines for non-compliance are issued monthly.