About us
Sacramento-based. Credentialed. Built for working fleets.
We started CARB Diesel Test because the old way of CARB compliance wasted fleet owners' most valuable asset: their trucks. Mobile testing puts that time back in your pocket.
Our story
We bring the test to you because that is how fleets actually operate
When California rolled out the Clean Truck Check program, fleet owners across the Sacramento Valley suddenly had a new recurring compliance burden. Shops filled up, wait times grew, and every test meant pulling a truck off dispatch, paying a driver, and eating the fuel cost of a round trip.
We saw that and built the opposite: a mobile service that comes to the fleet, runs the test in 15 to 35 minutes per vehicle, and uploads results before we leave the yard. Our customers include long-haul carriers, agricultural operators, construction contractors, school districts, and individual owner-operators. Same credentialed test, same CARB-compliant documentation, without the downtime.
What you get with us
Fully credentialed testers
CARB-certified to perform both OBD and OVI periodic compliance testing on heavy-duty diesel vehicles.
Transparent pricing
Flat per-vehicle rates with volume discounts. No hidden fees, no surprise charges.
Fast response
Request a test and we typically respond within 2 hours during business hours. Most visits scheduled within 24 to 48 hours.
Both test types
OBD for 2013+, OVI for 2012 and older. Mixed fleets handled on a single visit.
Who we serve
From the Port of Sacramento to the orchards of Yuba County, we work with: trucking companies, ag and construction operators, school bus districts, municipal and utility fleets, RV and motorhome owners, and individual owner-operators. If it runs a heavy-duty diesel engine and operates on California roads, we can test it where you park it.
Our home base
We operate out of 4361 Pell Dr #400, Sacramento, CA 95838, and dispatch mobile testers across a 100-mile radius covering Sacramento, Stockton, Elk Grove, Modesto, Folsom, Roseville, Davis, Rancho Cordova, Yuba City, Chico, and the communities between them.
Call us at (916) 538-7777 or request a visit online.
Ready to skip the shop trip?
Book mobile CARB testing and keep your trucks earning.