All diesel and CNG trucks over 14,000 GVWR are subject to a Clean Truck Check. 👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.

If your vehicle has a Gross Vehicle Weight Rating (GVWR) over 14,000 pounds and operates on California roads, it is subject to the California Air Resources Board (CARB) Clean Truck Check Program. This includes diesel-powered trucks, hybrid vehicles, and alternative fuel vehicles, whether registered in California or out-of-state. Even if your truck only enters California occasionally, it must comply with the Clean Truck Check regulations to avoid penalties and registration holds.

👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.

In 2025 and 2026, trucks must be tested twice per year—once before the DMV registration renewal date and again six months later. Starting in 2027, testing frequency increases to four times per year. Tests can be completed up to 90 days before the deadline, giving you flexibility to plan ahead.

👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.

The Clean Truck Check Program is a CARB initiative requiring semi-annual emissions testing for heavy-duty vehicles to reduce air pollution. It includes registration, compliance fees, and emissions reporting.

👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.

We specialize in testing a wide range of heavy-duty vehicles that fall under the Clean Truck Check Program, including:

• Semi trucks and tractor-trailers

• Motorcoaches and tour buses

• Transit and school buses

• Commercial fleet vehicles

• Out-of-state trucks operating in California

• California-registered diesel motorhomes

Our mobile smog check service is designed to meet the needs of both individual truck owners and fleet operators, ensuring fast, reliable, and CARB-compliant testing.

👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.

We provide mobile semi truck smog check services throughout Southern California, helping truckers and fleet operators stay compliant with CARB’s Clean Truck Check Program.

Our service regions include:

• Los Angeles County – Including Glendale, Long Beach, Pomona, and surrounding cities

• Inland Empire – Chino, Fontana, Ontario, and more

• Orange County – City of Industry, Irvine, Santa Ana

• San Gabriel Valley – Covina, Duarte, Irwindale, Monrovia, Pasadena

• San Fernando Valley – Burbank, Canoga Park, Chatsworth, Encino, North Hollywood, Northridge, Reseda, Sherman Oaks, Sylmar, Tarzana, Van Nuys, Woodland Hills

• Ventura & Coastal – Carpinteria, Moorpark, Simi Valley, Thousand Oaks

• San Diego County (Fleet Appointments Only) – San Diego, El Cajon, Escondido

Whether you're a solo operator or managing a fleet, our mobile team comes directly to your location—offering fast, reliable, and CARB-compliant emissions testing with minimal downtime.

📍View our full service area map to see if we’re in your neighborhood. 📞 Call/Text 909-600-4646 to check availability or Book Your Mobile Smog Check today!

Our mobile smog check typically takes 15 to 30 minutes per truck, depending on the vehicle’s engine type and readiness. We work efficiently to minimize downtime and keep your fleet moving.

👉 Stay compliant— view our pricing or Call/Text 909-600-4646 to Book Your Mobile Smog Check.