Clean Truck Check — California compliance hub
California’s Clean Truck Check program affects more than a million heavy-duty vehicles on the road today. This hub explains who must test, what CARB requires, how much compliance typically costs, and where to book a credentialed tester near you.
Zurfex is a marketplace operated by Zurfex LLC that connects truck owners and fleets with CARB credentialed emissions testers. We summarize program basics here, but official rules always come from CARB’s Clean Truck Check program on arb.ca.gov.
Why Clean Truck Check matters
Non-compliance can block DMV registration, trigger roadside enforcement, and create costly downtime for owner-operators and fleets alike. The program is designed to identify high-emitting trucks before they contribute disproportionately to smog and diesel particulate pollution in freight corridors across California.
Most operators interact with the program through CTC-VIS—the online portal where vehicles are registered, testing due dates appear, and compliance status is tracked. Understanding your due window, test type (OBD or smoke opacity), and documentation requirements is the foundation of staying road-legal.
Whether you run a single Class 8 tractor or a multi-state fleet with California-plated units, the guides below walk through each part of the compliance lifecycle—from initial registration through retest and renewal.
Guides in this hub
- What is Clean Truck Check?Program overview, CTC-VIS, and how HD I/M fits into CARB rules.
- Who needs Clean Truck Check?Vehicle types, weight classes, and operating scenarios that trigger testing.
- RequirementsRegistration, credentialed testers, test types, and documentation.
- Deadlines & due datesHow testing windows work and what happens if you miss a date.
- Costs & feesState fees, typical tester pricing, and how to budget per unit.
- Penalties & enforcementDMV holds, roadside enforcement, and compliance risk for fleets.
- Testing frequencyAnnual vs quarterly schedules and upcoming program changes.
- OBD testingWhen onboard diagnostics applies and how to prepare your truck.
- Smoke opacity testingPre-2007 engines, opacity limits, and pre-test maintenance tips.
- Compliance checklistStep-by-step list for owners, dispatchers, and fleet managers.
- ExemptionsLimited exemptions, out-of-state vehicles, and how to verify eligibility.