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  • Mitsubishi Fuso Authorized Dealer
    Established 1967
  • 1505 N 4th St. San Jose, CA
  • 408-263-7300
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Diesel Truck Smog Inspections in Santa Clara County

Ensure compliance with regulations and a smooth registration process with diesel truck smog inspections in Santa Clara County at nearby Diamond Mitsubishi Fuso. California requires smog tests biennially (every other year) to safeguard air quality and the environment. You cannot renew your vehicle registration without passing a smog test, making compliance essential.

Licensed Smog Checks for Commercial Vehicles and Trucks

Diamond Mitsubishi Fuso offers fast, affordable opacity tests in Santa Clara County at our locally owned, independent commercial truck repair and maintenance facilities. Our licensed smog tests typically include:

  • A visual inspection
  • Tailpipe emissions reading
  • Ignition timing check
  • Functional inspection of on-board diagnostics, including check engine light
  • Gas cap, fuel evaporation, and exhaust gas recirculation inspection

Which Vehicles Need a Smog Inspection in Santa Clara County?

The state of California and Santa Clara County requires smog checks every other year for most vehicles, including diesel-powered automobiles made after 1998. Diesel-powered vehicles with a gross weight of over 14,000 pounds may not need a smog check. However, very few commercial trucks qualify for a smog inspection exemption, so we recommend verifying exemption with our commercial automotive service technicians.

What to Do if You Fail a Smog Test

If your commercial vehicle fails a smog test, you must get it repaired and rechecked to qualify for registration renewal. Fortunately, the experienced ASE-certified commercial truck mechanics at Diamond Mitsubishi Fuso can fix common reasons for failed smog checks, including:

  • Bad fuel injectors
  • Improper air/fuel ratio monitoring
  • Malfunctioning mass airflow or oxygen sensor
  • Evaporative emission control system (EVAP) malfunctions
  • Leaky gas cap
  • Check engine light

Once we’ve performed diesel truck repairs, we can retest your vehicle, ensuring easy registration renewal and helping you avoid fines.

Tips for Passing Your Next Smog Check in California

Routine commercial truck maintenance, such as regular oil changes and tune ups, keep your engine running at peak performance, reducing the likelihood of smog test failure. As an added benefit, addressing maintenance needs and commercial truck repair issues when they arise minimizes the possibility of unexpected breakdowns.

When it’s time for diesel truck smog inspections in Santa Clara County, schedule your smog check service with a commercial truck repair shop you can trust. Diamond Mitsubishi Fuso offers affordable smog testing for Santa Clara, San Jose, Sunnyvale, Morgan Hill, Gilroy, Campbell, Sunnyvale, and Cupertino businesses. Contact us at 408-263-7300 to schedule an appointment for your vehicle or fleet today.

Santa Clara County

Santa Clara County, otherwise known as Silicon Valley, offers one of the highest standards of living in the country. Located at San Francisco Bay’s southern end, its temperate Mediterranean climate and high-tech employment opportunities lure residents and businesses. The county’s beautiful cities include Santa Clara, San Jose, Sunnyvale, Morgan Hill, Gilroy, Campbell, Sunnyvale, and Cupertino. Diamond Mitsubishi Fuso is proud to keep the region’s commercial trucks in motion, providing fast, affordable smog tests in Santa Clara County.

Mitsubishi Fuso Authorized Dealer

Hours of Operation:

Mon – Fri: 8:00AM – 5:00PM

Weekends or After Hours by Appointment

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Diamond Mitsubishi Fuso

1505 N 4th St. San Jose, CA 95112

(408) 263-7300


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