Clean Truck Check Modesto

What is the Clean Truck Check?

This program applies to all heavy-duty diesel and alternative fuel vehicles with a gross vehicle weight rating (GVWR) over 14,000 pounds. It encompasses trucks, buses, and motorhomes, including both in-state and out-of-state vehicles operating on California public roads.

The Clean Truck Check, officially known as the Heavy Duty Inspection and Maintenance (HD I/M) program, is a groundbreaking emissions-reduction initiative by the California Air Resources Board (CARB). It is designed to ensure heavy-duty vehicles contribute to cleaner air and a healthier environment in California.

Understanding the Mandate

California’s Clean Truck Check program, effective January 1, 2024, introduces mandatory annual emissions testing for heavy-duty vehicles exceeding 14,000 pounds GVWR operating within the state. 

Testing involves a sophisticated OBD diagnostic check, smoke opacity measurement, and a visual inspection of emissions control components like the Diesel Particulate Filter (DPF) and SCR system. Compliance ensures your vehicle remains operational while contributing to California’s cleaner air initiatives.

The cornerstone of the Clean Truck Check program is its comprehensive testing protocol. Testing must be conducted at CARB-certified facilities, where qualified technicians perform a multi-point inspection that goes far beyond traditional smoke testing. The inspection process begins with a sophisticated OBD (On-Board Diagnostics) system check, which provides detailed insights into the vehicle’s emissions control systems’ performance. Technicians then conduct a smoke opacity test using calibrated equipment to measure particulate emissions levels.

Resources and Support

If you’d like to schedule your appointment today for Clean Truck Check, call us today! Together, we can reduce emissions and drive towards a cleaner future for California.