CTC Emissions Testing

Vehicle owners must take the following steps to comply with Clean Truck Check:

1. Report affected vehicle(s) in the Clean Truck Check (CTC-VIS) database system.

   1. The information needed to report in CTC-VIS is listed within the Database Reporting Requirements.

   2. Reporting Resources (CTC-VIS) provides video tutorials and helpful information about the reporting process.

2. Pay annual compliance fee

   1. Payments must be made in CTC-VIS. Payments made in other CARB portals will not be accepted

   2. The compliance fee can be paid by either a debit/credit card or e-check. Paper check mailing will NOT be accepted.

3. Submit a passing emissions compliance test by the applicable deadline.

   1. Deadlines for each vehicle are in the Testing Details tab on the My Entity page in CTC-VIS.

   2. Emissions compliance testing and submission of results must be performed by CARB credentialed testers.

   3. Semi-annual passing test submission are required for most vehicles (See Clean Truck Check Requirements for Vehicles Subject to Semi-Annual Compliance).

      1. Effective October 1, 2027, test submission requirements increase to four times per year ONLY for vehicles equipped with On-Board Diagnositc Systems (OBD). Deadlines will continue to be shown in CTC-VIS.

   4. California registered motorhomes(for recreational and emergency use) and vehicles that meet the agricultural vehicle definition are required to test annually.

      1. Agricultural Vehicles Requirements

      2. Motorhome Requirements