Clean Truck Check for Port of Los Angeles drayage trucks
Drayage trucks serving the Port of Los Angeles need CARB's Clean Truck Check like most other diesel and alternative-fuel trucks over 14,000 lb GVWR. Diesel Dynamix tests them on site, so your tractor stays near the harbor instead of driving to a test site.
We meet drivers and fleets at yards, truck parking and staging lots in Wilmington, San Pedro, Harbor City and the Harbor Gateway, and at lots near Terminal Island. A port of Los Angeles truck emissions test is the same CARB test any truck gets:
- Drayage truck OBD test for 2013 and newer diesel and 2018 and newer alternative-fuel engines.
- Smoke opacity test plus visual inspection for 2012 and older diesel trucks without OBD.
Owner-operators can book a single-truck appointment between port runs. Fleets can book a multi-truck day with results for every VIN. Early-morning visits help you test before the gates get busy. Call or text (858) 342-8328 or book online.
Port of LA Clean Truck Program vs. Clean Truck Check
They are not the same thing. Clean Truck Check is CARB's statewide emissions testing program for heavy-duty vehicles. The port's own Clean Truck Program and its drayage truck registry are separate port rules.
That means a drayage truck can have two sets of requirements:
- CARB's Clean Truck Check: report the truck in CTC-VIS, pay CARB's annual compliance fee there, and pass a test from a tester like us by each deadline.
- Port requirements: whatever the port and its registry ask of trucks entering the terminals. Confirm those with the port directly.
Diesel Dynamix is an independent testing service, not CARB, the port or a government agency. We handle the Clean Truck Check test, explain the result and give you the next due date. We can also help with CTC-VIS questions. For the background on why the state runs this program, see why California enforces Clean Truck Check.
Port of LA truck compliance in 2026 and beyond
Most covered trucks, including port drayage, currently test twice a year. Under CARB's original rule, OBD-equipped trucks move to four tests a year from October 1, 2027. A bill has proposed cutting testing to once a year, so the schedule may change. Check your own deadlines in CTC-VIS. See our 2026 and 2027 deadline guide.
Out-of-state and international drayage trucks that operate in California fall under Clean Truck Check too. We test them near the harbor the same way we test California-plated trucks. More on that in out-of-state trucks.
Falling behind has real costs. California-registered trucks can get a DMV registration hold, and CARB can issue citations and penalties. If a drayage truck fails, the usual causes are a check engine light, readiness monitors not set, DPF faults, or tampered or deleted equipment. The truck needs repair and a retest. We do not do repairs, but we tell you exactly what failed.
