The California Air Resources Board is transitioning Clean Truck Check inspections from a bi-annual schedule — twice per year — to quarterly, meaning your trucks will need to pass compliance testing four times per year. Here is what that means for your fleet and how to stay ahead of it.
2×
More inspections per year
4×
Tests required annually
0
Downtime with OC Clean Link
The change
Under the updated CARB Clean Truck Check program, heavy-duty diesel trucks subject to the regulation will move from bi-annual inspections — two per year — to quarterly inspections, requiring four compliance tests per year per truck. This doubles the testing frequency and puts significantly more pressure on fleet operators to keep trucks tested and in compliance year-round.
Before
Bi-Annual
2 inspections per truck, per year
Now
Quarterly
4 inspections per truck, per year
The impact
For fleets already managing bi-annual in-person inspections, doubling to quarterly means pulling trucks off the road twice as often. For a fleet of ten trucks, that is forty inspection events annually — each one requiring a driver, a time slot, and a trip to a testing location. The jump from bi-annual to quarterly is not a minor adjustment. It is a significant operational change.
Twice as many inspections as before.
Moving from bi-annual to quarterly doubles the scheduling burden on your fleet. The more trucks you operate, the bigger the impact on your bottom line.
The solution
OC Clean Link was built for exactly this kind of recurring compliance requirement. Because the system tests remotely while the truck is operating, the move from bi-annual to quarterly inspections does not change your drivers' day or pull trucks off the road.
Install once. Handle every quarterly test remotely.
Whether CARB requires two inspections per year or four, OC Clean Link is designed to handle it without disrupting your fleet's schedule.
Questions
CARB is phasing in the quarterly inspection requirement as part of the ongoing Clean Truck Check program rollout. Contact us and we can discuss the current timeline and how it applies to your specific trucks and model years.
The Clean Truck Check program applies to Class 4–8 heavy-duty diesel trucks operating in California. The quarterly requirement applies to trucks subject to the regulation — call us to confirm whether your fleet is affected and when.
CARB enforces compliance through the Clean Truck Check program and non-compliant trucks can face penalties and restrictions. With four testing windows per year instead of two, staying on schedule is more important than ever — OC Clean Link is designed to help you avoid missing a testing window.
Yes, in-person inspections remain an option. However, for fleets with multiple trucks, the time and scheduling cost of four in-person visits per truck per year — up from two — adds up quickly. OC Clean Link is designed to make the quarterly requirement manageable without the added downtime.
Act now
Call or text OC Clean Truck to find out how OC Clean Link can handle your fleet's quarterly CARB inspections remotely.