Professional Mobile Diesel OBD and OVI Testing - Northern California

On-Demand CARB Compliance Testing for Trucks & Fleets

Convenient Clean Truck Checks at Your Location - Sacramento to StocktonSacramento, San Jose, San Francisco and Stockton regions.

Call or Text 916-890-4427

email us at sales@norcalcarbmobile.com

Starting at $75 • Same-Day Service Available • Licensed & Certified

Professional OBD & Smoke Testing Throughout Northern California 

Call or Text 916-890-4427

[Schedule Now] [Get Quote]

Skip the shop wait times. Our certified technicians bring CARB compliance testing directly to your location - whether you're at home, work, or on a job site. Professional equipment, transparent pricing, and thousands of successful tests completed across Northern California.

CARB Clean Truck Check & J1667 Smoke Test Updates – Follow NorCal CARB Mobile on Instagram

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View fullsize Talk about how nice it was in Oakland/Livermore today CARB compliance for HDVs

Refer a Diesel Truck. Get $10. No Limits.

Know a truck that needs a Clean Truck Check? Send them our way and earn a $10 Digital Visa Gift Card for every truck that completes testing with us.

There’s no limit to how many cards you can earn — seriously. One of our customers referred 12 trucks and already has their own annual Clean Truck Check covered, totally free.

How it works:

  1. Tell a friend, coworker, or company about us.

  2. They mention your name when they book.

  3. Once their truck is tested, we send you a $10 digital gift card — fast and easy.

Whether you send one truck or ten, you’re saving money and helping others stay compliant. Everybody wins.

Start referring today and watch the rewards stack up.

Have questions or want to get started? Contact us anytime.

An advertisement emphasizing the importance of staying compliant and on the road for diesel truck operators over 14,000 lbs in California. It features a white semi-truck on a highway at sunset with a red stop sign icon. The text reads: "Stay complian
A row of white delivery vans parked in a lot surrounded by green trees on a sunny day.
A blue and black NEXIQ USB-Link 3 diagnostic device with various cables and connectors in a black case.
White Volvo semi-truck parked outside a garage on a cloudy day, reflected in puddles on the ground.
A man standing beside a white tow truck holding the door open at an industrial site with warehouse buildings and a chain-link fence in the background.
White septic pumping service truck with blue lettering and tree in background.
A laptop and electronic equipment on the hood of a white vehicle.
Logo for a clean truck check credentialed tester with a stylized checkmark and geometric shapes.
A laptop on a desk with a car dashboard visible in the background.
Piles of chopped wood and concrete debris next to a white service truck in a yard with a building and a tall radio tower in the background.
Close-up of a control switch with a blue rubber cover and a coiled cord, attached to a vehicle dashboard.
A white truck with a sign advertising a clean truck check for $75, including a phone number.