About CARB Clean Truck Check
What is CARB Clean Truck Check
The CARB Clean Truck Check is a compliance program created by the California Air Resources Board to reduce air pollution from heavy-duty trucks and buses operating in California. The program applies to most non-gasoline vehicles over 14,000 lbs GVWR, including diesel and certain alternative-fuel vehicles, even if they are registered out of state. Clean Truck Check ensures that emissions control systems—such as DPFs, SCR systems, and sensors—are working properly through periodic testing.
How to Know you require a CARB Clean Truck Check
You are required to comply with the CARB Clean Truck Check program if your vehicle is non-gasoline, operates on California public roads, and has a GVWR over 14,000 pounds. This includes most diesel and certain alternative-fuel trucks and buses, even if they are registered outside California.
Owners of affected vehicles must register each vehicle in the Clean Truck Check Vehicle Inspection System (CTC-VIS), pay annual compliance fees, and submit required emissions test results by assigned deadlines. Failure to register or comply can lead to enforcement actions, fines, or DMV registration holds.
Our Services
Understanding California’s HD/IM requirements can be confusing Longden Test Only makes it simple.
Longden Test Only offers:
- Mobile HD/IM testing at your location
- Same-day appointments to minimize downtime
- State-licensed, HD/IM–certified testers
- Assistance with VIN and plate mismatch issues
- Dedicated support for fleets and independent owner-operators
We handle the details so you don’t have to. Our experienced team helps you stay compliant with Clean Truck Check requirements, avoid costly penalties, and get your vehicle cleared quickly. Whether you operate a single truck or manage an entire fleet, Longden Test Only provides fast, reliable service designed to keep you on the road with confidence.
Why choose Longden Test Only?
HD/IM Inspections
Competitive Pricing
HD/IM Inspections
Longden Test Only is a state-licensed HD/IM tester proudly serving Los Angeles County. We perform CARB Clean Truck Check (HD/IM) inspections on OBD-equipped diesel trucks and buses over 14,000 lbs GVWR, including commercial fleets and qualifying motorhomes. Our inspections meet all requirements set by the California Air Resources Board
Mobile Service
Competitive Pricing
HD/IM Inspections
Longden Test Only provides mobile HD/IM testing at your yard, job site, or place of business for maximum convenience. We offer same-day appointments for most Los Angeles County locations, helping you minimize downtime, stay compliant, and keep your vehicles on the road.
Competitive Pricing
Competitive Pricing
Competitive Pricing
Longden Test Only offers reliable, affordable HD/IM testing with flexible scheduling tailored for fleets, contractors, and independent owner-operators. We also provide discounted pricing for multi-vehicle and fleet accounts, helping you stay compliant while controlling operating costs.