['Air Programs']
['Air Programs']
01/10/2025
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If you received a NST letter, you have 30 days to submit a passing emissions test to CARB. To help get your vehicle tested, check the list of “Available for Hire Credentialed Testers” on the CARB website. The list includes commercial CARB-credentialed Clean Truck Check (HD I/M) Testers with contact information.
Alternatively, the Clean Truck Check program allows a vehicle owner or a fleet mechanic to conduct the required testing and reporting. A tester needs to take the Clean Truck Check (HD I/M) training, pass the exam, and use the correct test equipment. The “Tester Training Course and Exam” are also available on the CARB website.
Failure to submit a passing test may result in:
- An enforcement violation,
- Loss of compliance certification, and
- California vehicle registration hold.
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