Free Pre-Checks & Re-Testing
We believe in making CARB compliance as easy as possible. That’s why we offer:
Free Pre-Check
Not sure if your truck will pass? We’ll review your emissions system before the official test to catch potential issues early.
Free Re-Testing
If your truck fails, we don’t charge for a re-test after repairs. We’ll make sure you pass before submitting your compliance certification.
Emissions Testing for
2012 & Older Diesel Engines
Heavy-duty diesel trucks model year 2012 and older must pass emissions testing under CARB’s Clean Truck Check program. Since these vehicles lack OBD systems, testing is performed using smoke opacity testing and visual inspections.
What's Included?
Smoke Opacity Testing
Measures particulate emissions (PM)
Visual Inspection
Confirms emissions control components are present and functional
Mobile & Onsite Testing
We test at your location or one of our facilities
Repairs & recalibrations to fix compliance failures
Who Needs This Test?
Any 2012 or older diesel truck operating in California without an OBD system.
Testing Frequency
Semi-annual (twice per year) as required by CARB
Emissions Testing for
2013 & Newer Diesel Engines
For 2013 and newer diesel trucks, CARB requires On-Board Diagnostics (OBD) testing to monitor emissions performance. These vehicles have built-in OBD systems, allowing for digital emissions monitoring instead of relying solely on smoke opacity testing.
What's Included?
OBD System Scan
Reads emissions data to detect compliance issues
Smoke Opacity Testing (If required)
Ensures exhaust emissions remain within
CARB’s limits
Mobile & Onsite Testing
We test at your location or one of our facilities
Repairs & recalibrations to fix compliance failures
Who Needs This Test?
Any 2013+ diesel truck required to comply with CARB’s HD I/M program
Testing Frequency
Semi-annual (twice per year) starting 2025 (Quarterly testing begins in 2027 for some vehicles)
Emissions Testing for
Fleet Operators
Managing multiple trucks while staying CARB compliant can be challenging. Our Fleet Compliance Management service makes it easy to track, schedule, and maintain compliance across your entire fleet.
What's Included?
Scheduled Testing & Tracking
Measures particulate emissions (PM)
Regulatory Support & Consulting
Confirms emissions control components are present and functional
Mobile & Onsite Testing
We test at your location or one of our facilities
Repairs & recalibrations to fix compliance failures
Who Needs This Test?
Fleet managers overseeing multiple diesel trucks, Businesses needing compliance tracking
Testing Frequency
Ongoing Service: Customized to your fleet’s needs
Common Compliance Issues that we Fix:
