Upcoming Changes in CARB Regulations – What Fleet Owners Need to Know
- The Specialists at CDS
- Mar 3
- 1 min read
Updated: Mar 6
What’s Changing in 2025 & Beyond?
CARB (California Air Resources Board) has introduced new emissions compliance rules that will impact fleet owners and diesel truck operators. Staying informed is essential to avoid fines, ensure compliance, and keep your trucks on the road.
2025 CARB Regulation Updates
Stricter OBD Testing Requirements: Starting in 2025, all 2013+ diesel trucks will need OBD emissions testing twice per year.
Quarterly Testing Begins in 2027: Vehicles equipped with OBD systems will need quarterly emissions tests to remain compliant.
Advanced Clean Fleets (ACF) Rule Compliance: Certain fleet operators must begin transitioning to zero-emission vehicles.
Key Compliance Deadlines for Fleet Owners
📅 January 1, 2025 – Mandatory semi-annual emissions testing for all heavy-duty diesel trucks.
📅 October 1, 2027 – OBD-equipped vehicles begin quarterly testing requirements.
How to Stay CARB Compliant in 2025
✔ Schedule emissions tests on time to avoid penalties.
✔ Upgrade older vehicles to meet stricter standards.
✔ Monitor CARB updates for new fleet transition requirements.
📌 Need Help Staying Compliant? Schedule a CARB Test Today
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