Clean Truck Check for out-of-state trucks
Understand California Clean Truck Check for trucks registered in another state, including the 2026 CARB clarification and remote testing options.
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OBD vs opacity: which Clean Truck Check test applies?
Compare OBD and non-OBD Clean Truck Check methods by engine model year and fuel. Learn why a connector alone does not establish remote compatibility.
Clean Truck Check failed or not ready: next steps
Understand why clearing codes is not a repair, how to prepare after maintenance, and what to ask before a Clean Truck Check retest.
Where to find Clean Truck Check results in CTC-VIS
Understand the difference between a connected device, a provider portal and an official CTC-VIS test result. Steps for a missing result.
Clean Truck Check DMV hold: where to start
Read the hold reason before ordering a test. Find CARB contacts for Clean Truck Check and other registration holds, and prepare the right information.
Clean Truck Check deadlines and October 2027 changes
Learn where to check vehicle due dates and which Clean Truck Check testing frequency changes begin October 1, 2027.
Clean Truck Check NST: what to do after a notice
Understand a Notice to Submit to Testing, the CARB response window and why it should not wait for a routine test date.
Clean Truck Check cost: device, service and retests
Compare the full cost of remote and mobile Clean Truck Check: hardware, subscription, tests, retests, travel, renewal and the separate CARB fee.