Clean Truck Check

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Mobile Clean Truck Check

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We’re a mobile Clean Truck Check inspection service—we come to you!

Book a Clean Truck Check

TRACY call: (209) 830-0086
Manteca Call: (209) 823-6263
Stockton Call: (209) 478-7664

Book a mobile diesel smog check with us online, or by calling us at (209) 622-9156. We offer flexible times and will come to your location

Senate Bill 210 (Leyva; Chapter 298, Statutes of 2019) instructed CARB to develop and execute a comprehensive regulation for the inspection and maintenance of heavy-duty vehicles (HD I/M) to ensure that their emissions control systems are working properly while on California’s roads. The Board approved the regulation on December 9, 2021, and it will be gradually implemented starting in January 2023. The program, called Clean Truck Check, combines periodic vehicle testing requirements with other emissions monitoring techniques and expanded enforcement strategies to identify vehicles needing emissions-related repairs and ensure that necessary repairs are carried out. Once fully implemented, the program will significantly reduce smog-forming and carcinogenic toxic air pollution, essential for meeting federal air quality requirements and ensuring clean air in California’s

California Clean Truck Check Program

Overview

California Clean Truck Check is a mandatory inspection and maintenance program designed to ensure heavy-duty vehicles operating in California meet emissions standards. This program helps reduce harmful pollutants from diesel trucks, improving air quality throughout the state and helping California meet its climate goals.

Types of Clean Truck Check Services

1. OBD (On-Board Diagnostics) Testing

Most newer heavy-duty vehicles (model year 2013 and newer) equipped with on-board diagnostic systems must undergo periodic OBD testing:

• Tests engine and emissions control systems through the vehicle’s computerized diagnostic system
• Verifies proper functioning of emissions components
• Quick process that can be completed in approximately 15-30 minutes
• Required every 6 months for most vehicles

2. Opacity Testing

For older vehicles (pre-2013) without OBD systems:

• Measures the density of smoke emitted from the exhaust
• Determines if particulate matter emissions exceed legal limits
• Takes approximately 30-45 minutes to complete
• Required annually for applicable vehicles

3. Visual Inspection

All heavy-duty vehicles must undergo visual inspections:

• Checks for tampering with emissions control systems
• Ensures all emissions components are present and properly connected
• Verifies no visible smoke or leaks
• Conducted alongside other testing methods

4. Roadside Emissions Monitoring

The California Air Resources Board (CARB) conducts random roadside emissions testing:

• Uses remote sensing technology to measure emissions as vehicles drive by
• Identifies high-emitting vehicles for follow-up inspections
• Supplements the regular testing program
• No action required by drivers unless contacted for follow-up

Requirements for Truckers

Who Must Comply

• All heavy-duty diesel vehicles with a GVWR of 14,001+ pounds operating in California
• Includes out-of-state trucks that enter California
• Both fleet-owned and independent operator vehicles
• Exemptions may apply for certain emergency, military, or historic vehicles

Testing Schedule

Vehicle Type	Testing Frequency	First Compliance Date
2013+ with OBD	Every 6 months	January 1, 2024
Pre-2013 without OBD	Annual opacity test	July 1, 2023
All vehicles	Annual visual inspection	Concurrent with other tests

Compliance Steps

1. Register in CARB’s reporting system
   • Create an account in the TRUCRS (Truck Regulation Upload, Compliance, and Reporting System)
   • Provide vehicle and owner information
   • Pay the annual compliance fee
2. Schedule testing at approved facilities
   • Find an authorized Heavy-Duty Vehicle Inspection and Maintenance (HD I/M) testing location
   • Testing can be performed at certified truck stops, fleet facilities, or mobile testing units
   • Testing appointments can be scheduled online or by phone
3. Complete required testing
   • Bring your vehicle and registration documents to the testing facility
   • Testing technicians will perform appropriate tests based on vehicle type
   • Results are electronically submitted to CARB
4. Maintain compliance records
   • Keep digital or physical copies of test results
   • Store records for at least 4 years
   • Have documentation available during roadside inspections
5. Address any failures promptly
   • If your vehicle fails testing, repairs must be completed within 90 days
   • Re-testing is required after repairs
   • Continued operation of non-compliant vehicles may result in penalties

Penalties for Non-Compliance

• Fines ranging from $300-$1,800 per violation
• Potential vehicle impoundment for repeat offenders
• DMV registration holds
• Restricted access to ports and intermodal facilities

Benefits of Compliance

• Reduced air pollution and greenhouse gas emissions
• Improved public health outcomes
• Better fuel efficiency and potential cost savings
• Avoiding costly penalties and operational disruptions
• Contributing to California’s climate goals

Resources

• Find authorized testing locations
• Schedule testing appointments
• Access compliance assistance
• Review testing requirements
• Get answers to frequently asked questions
• Download the mobile compliance app