Question: What is the difference between the Clean Truck Check and the Heavy-Duty Inspection and Maintenance Program?
Answer: They are the same program. The Heavy-Duty Inspection and Maintenance Program (HD I/M) has been rebranded to the Clean Truck Check. The new program name was chosen to be more user-friendly, much in the same way the Smog Check name is easily recognizable for BAR’s light-duty inspection and maintenance program.
Question: What are the vehicle testing requirements for the Clean Truck Check program?
Answer: Currently, vehicle compliance tests are only required if you receive a Notice to Submit to Testing (NST). Upon receiving an NST, a passing vehicle compliance test is required within 30 days of receipt. Please refer to the Vehicle Owner Basics factsheet for additional information on current testing requirements.
Please note that Periodic Testing Requirements will be phased in starting in 2024. This will require nearly all vehicles subject to the program to undergo twice per year testing with results submitted to CARB. Agricultural vehicles and California-registered motorhomes will be required to undergo testing once per year. CARB plans to release more information on the timing of these requirements in July of 2023.