Trusted Experts in Clean Truck Check Compliance
CARB’s Clean Truck Check (CTC) program aims to improve air quality across California by reducing harmful diesel emissions. Unlike earlier regulations, the CTC applies to nearly all diesel trucks and many other diesel-powered vehicles operating on California roads. CarbTech is here to guide you through the new requirements—ensuring your vehicles are properly registered, tested, and compliant. For your convenience, our mobile testing team comes to you—anywhere in the state.
Emissions Testing for
2012 & Older Diesel Engines
Diesel trucks from 2012 or older must pass emissions tests under CARB’s Clean Truck Check. Without OBD systems, these vehicles are tested using smoke opacity and visual inspections.
What's Included?
Smoke Opacity
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
Who Needs This Test?
Diesel trucks model year 2012 or older without OBD systems operating in California.
Testing Frequency
Semi-annual (twice per year) as required by CARB
Emissions Testing for
2013 & Newer Diesel Engines
For diesel trucks model year 2013 and newer, CARB mandates On-Board Diagnostics (OBD) testing to track emissions performance. These vehicles are equipped with OBD systems, enabling digital emissions monitoring rather than traditional 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
Who Needs This Test?
Any 2013 or newer diesel truck subject to CARB’s HD I/M program requirements.
Testing Frequency
Testing required twice per year starting in 2025 (quarterly testing begins in 2027 for certain vehicles).
Emissions Testing for
Fleet Operators
Staying CARB compliant across a large fleet can be complex. Our Fleet Compliance Management service simplifies tracking, scheduling, and maintaining compliance for all your vehicles.
What's Included?
Scheduled Testing & Tracking
Reads emissions data to detect compliance issues
Regulatory Support & Consulting
Ensures exhaust emissions remain within
CARB’s limits
Mobile & Onsite Testing
We test at your location or one of our facilities
Who Needs This Test?
Fleet managers responsible for multiple diesel vehicles, and businesses requiring compliance monitoring.
Testing Frequency
Ongoing Support: Tailored to Your Fleet’s Specific Requirements
Get a Quote
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Get In Touch
Locations
Victorville
Los Angeles
Riverside
Anaheim
Contact
Opening Hours
Mon - Fri
7:00 am – 8:00 pm
Saturday
9:00 am – 7:00 pm
Sunday
10:00 am – 6:00 pm