
Fact Sheets & FAQs
- Clean Truck Check (HD I/M)
- DMV Registration Notice with CARB Non-Compliant Vehicle Warning
- Upcoming Requirements
- Fact Sheets & FAQs
- Tester Training Course & Exam
- Credentialed Testers
- OBD Test Devices
- Smoke Opacity Manufacturers with SAE J1667-Compatible Meters
- Vehicle Emissions Control Equipment Inspection Form
- Vendor Device Certification
- Job Opportunities
- Meetings & Workshops
Contact
Clean Truck Check (HD I/M)
Email
Implementation Guidance
- June 2023 Guidance to Vehicle Owners on Upcoming Requirements
- Guidance to Vehicle Owners on 2024 Periodic Testing Requirements for Vehicles Subject to Semiannual Testing (Issued August 23, 2023)
- Guidance to Vehicle Owners on 2024 Periodic Testing Requirements for Vehicles Subject to Annual Testing: California Registered Motorhomes and Agricultural Vehicles (Issued August 23, 2023)
Fact Sheets
- Vehicle Owner Basics | Español | ਪੰਜਾਬੀ
- Background and Regulation Basics | Español | ਪੰਜਾਬੀ
- Periodic Testing Requirements | Español | ਪੰਜਾਬੀ
- Tester Training and Examination | Español | ਪੰਜਾਬੀ
- On-Board Diagnostics (OBD) Testing Devices | Español | ਪੰਜਾਬੀ
- Database Reporting Requirements
- Handout | Español
Frequently Asked Questions (FAQs)
Find answers to our most popular questions. If you don't find the answer to your question, please contact hdim@arb.ca.gov.