Staying compliant with the latest CARB regulations for small fleets is essential for avoiding penalties, registration holds, and costly operational disruptions. If you operate 3 or fewer diesel vehicles with a gross vehicle weight rating (GVWR) over 14,000 lbs, you are required to meet Clean Truck Check compliance requirements, including emissions testing, reporting, and proper engine upgrades.  California's CARB regulations continue to evolve with the full rollout of the Clean Truck Check program and the Advanced Clean Fleets (ACF) regulation. Both compliance programs work together to reduce diesel emissions and promote cleaner air while ensuring fleets meet emissions standards.

The Clean Truck Check focuses on periodic emissions testing and reporting for all diesel vehicles over 14,000 lbs GVWR, including small fleets, diesel motorhomes, and agricultural vehicles.

Advanced Clean Fleets (ACF) targets the transition to zero-emission vehicles (ZEVs) for many fleets, particularly focusing on larger fleets and government-operated vehicles.

If your small fleet consists of 3 or fewer diesel vehicles, you're required to comply with Clean Truck Check standards, including emissions testing, reporting, and proper engine upgrades. The ACF regulation provides further guidance for fleets considering a shift to zero-emission technologies over the coming years.