Clean truck check
Beginning January 1st 2025, any non-gasoline vehicle with a manufacturer's Gross Vehicle Weight Rating (GVWR) over 14,000 pounds and is a California (CA) vehicle registered to operate in CA on public roads and highways, including IRP is required to submit a passing Clean Truck Check emissions compliance test emissions testing
Clean Truck Check
OBD-equipped vehicles
Vehicles from 2013 and newer undergo the HD I/M test, which is sent electronically to CARB. OBD-equipped vehicles are tested twice a year, and four times a year after three years.
Opacity Testing
Non-OBD-equipped vehicles
Vehicles from 2012 and older undergo a smoke opacity test and a visual inspection of the emissions control equipment. Alternative fuel vehicles from 2017 and older only undergo the visual inspection. Non-OBD-equipped vehicles are tested twice a year.
RVs
Testing is required for all motorhomes with California registrations by the DMV registration expiration, and out-of-state vehicles have deadlines based on the last four digits of their vehicle's VIN number. California registered motor homes are only required to sub emissions compliance testing once annually. emission testing equipment