Truck emissions testing in California
Heavy-duty emissions testing in California means Clean Truck Check: CARB’s program for verifying that diesel trucks on the road meet ongoing emissions standards—not just at the factory. Here is how testing works, what it costs, and how to book a credentialed inspector on Zurfex.
Testing in the Clean Truck Check era
Passenger cars get STAR smog checks; heavy-duty diesels get OBD diagnostics or smoke opacity measurements under CARB rules. Results flow electronically to the Clean Truck Check Vehicle Inspection System (CTC-VIS), where owners track compliance alongside state fee payments.
Program requirements evolve on arb.ca.gov. Zurfex helps you act on those rules by connecting you with independent credentialed testers—not by administering the program itself.
Deep dive: Clean Truck Check hub and program overview.