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CARB Diesel Test
Mack concrete mixer truck undergoing CARB Clean Truck Check inspection at a Sacramento Region construction yard

CARB Testing in Sacramento Region

Mobile CARB Clean Truck Check testing across the Sacramento Region

We dispatch credentialed testers to your yard, terminal, or job site across Sacramento, the Central Valley, and Northern California. OBD and OVI results uploaded before we leave.

CARB Credentialed Tester
200+ 5-Star Reviews
OBD & OVI Certified
Mobile Service Available

Why Northern California fleets choose mobile CARB testing

Driving a heavy-duty diesel across Sacramento or up Highway 99 for a CARB Clean Truck Check is expensive. Fuel, dispatcher time, and the half-day a truck spends out of revenue add up quickly. For larger fleets, taking even one rig out of rotation can cost more than the test itself. For owner-operators, it means losing a paying load.

Mobile testing flips the math. Our credentialed tester comes to your yard, your job site, or your driveway. We run OBD or OVI testing on-site, upload results during the visit, and leave. You stay compliant. The trucks stay working. The schedule stays intact.

CARB-credentialed tester performing on-site emissions testing on a heavy-duty diesel truck at a Sacramento Region fleet yard

What we test

We are credentialed by CARB for the full Clean Truck Check program. That covers:

  • OBD testing for diesel engines model year 2013 and newer. Electronic readout, same-day DMV clearance on passes.
  • OVI opacity testing for older diesel engines that pre-date OBD. Smoke meter and visual inspection.
  • BAR-OIS testing for diesels under 14,000 pounds GVWR.
  • Fleet visits ranging from a single rig to 50-plus vehicles in one dispatch.
  • RV and motorhome testing at home addresses across the region.

How it works

The mobile testing process is straightforward. Four steps from call to compliant.

Step 1. Call or book online. Tell us the city, the vehicle count, and the engine years. We confirm scope and pricing.

Step 2. We schedule. Most visits are booked within 24 to 48 hours. Same-day service is often available for active DMV holds when called early.

Step 3. Our credentialed tester arrives. OBD scan tool or OVI opacity meter, whichever your engines require. We test each vehicle on-site at your yard, terminal, job site, or home address.

Step 4. Results upload before we leave. For OBD passes, CARB releases compliance to DMV the same business day. We provide a written report and invoice.

That is the whole process. No driving the truck across town. No half-day at a test station.

Where we dispatch in the Sacramento Region

We routinely serve Sacramento, Stockton, Modesto, Folsom, Roseville, Elk Grove, Davis, Rancho Cordova, Yuba City, and Chico. Beyond that core, we regularly travel to Lodi, Tracy, Manteca, Vacaville, Auburn, Marysville, Lincoln, Citrus Heights, Carmichael, and the foothill construction corridors.

Our highest service density is along the I-5, I-80, and Highway 99 freight corridors and the industrial districts that feed them: Power Inn Road, McClellan Business Park, Natomas warehouse corridor, the Port of Sacramento, the Port of Stockton, and the Central Valley ag distribution centers.

Same-day DMV hold clearance

For 2013 and newer engines eligible for OBD testing, we upload results electronically during the visit. CARB releases compliance to the DMV the same business day in most cases, which means a registered vehicle under a hold can come off it within hours of the test. If you are under a time-sensitive hold and the registration deadline is looming, call early in the day and we will prioritize.

The fleets we work with

Regional trucking and LTL carriers running Sacramento Valley distribution routes. Construction and grading contractors building foothill housing and downtown commercial. Agricultural haulers and refrigerated produce fleets moving Central Valley crops. Food-service and beverage distribution. Waste, recycling, and street-sweeping fleets across the metro. Municipal and school district fleets. Heavy-duty RV and motorhome owners. Owner-operators with rigs parked at home addresses.

If you operate a diesel above the CARB threshold in Northern California, we work with operators like you every week.

One call, any size fleet

Whether you run a single rig out of an Elk Grove driveway or operate a 50-truck fleet from a Stockton yard, the call is the same. Tell us the location, vehicle count, and engine years. We confirm, schedule, and dispatch. The trucks stay where they belong. You stay compliant.

Local landmarks we dispatch near

  • Port of Sacramento
  • Port of Stockton
  • I-5 and I-80 freight corridors
  • Highway 99 Central Valley spine
  • Power Inn Road industrial district
  • McClellan Business Park
  • Natomas warehouse corridor
  • Stockton and Modesto distribution hubs
  • Foothills construction sites (Folsom and Roseville)
  • North State agriculture (Yuba City and Chico)

Sacramento Region industries we serve

  • Regional trucking and LTL carriers
  • Construction and grading contractors
  • Agricultural haulers and produce distribution
  • Food-service and beverage distribution
  • Waste, recycling, and street-sweeping fleets
  • Municipal and school district fleets
  • Heavy-duty RV and motorhome owners
  • Owner-operator truckers

Frequently asked questions

How fast can you get a tester to my yard?
Most Sacramento Region requests are scheduled within 24 to 48 hours. Same-day service is often possible when called before 10 a.m., especially in the immediate Sacramento metro and along the I-5 and I-80 corridors.
What areas do you serve in Northern California?
Our dispatch radius covers Sacramento, Stockton, Modesto, Folsom, Roseville, Elk Grove, Davis, Rancho Cordova, Yuba City, Chico, and the surrounding cities. Most of the I-5, I-80, and Highway 99 corridors fall inside our service area. Call us with your zip and we will confirm.
What is the difference between OBD and OVI testing?
OBD applies to model year 2013 and newer diesel engines and uses an electronic interface to read emissions readiness data. OVI is opacity testing for older engines using a smoke meter and visual inspection. We are credentialed for both and bring the right equipment based on the engines you tell us about.
Can you handle a 50-truck fleet in one visit?
Yes. We move through 20-plus and 50-plus vehicle lineups routinely. Stage the rigs, have keys and engines ready, and we will work through them efficiently with one consolidated invoice at the end.
How does same-day DMV hold clearance work?
For 2013 and newer engines passing OBD, we upload results electronically during the visit. CARB releases compliance to DMV the same business day in most cases, which means your registered vehicle can come off its DMV hold within hours.
Do you test at residential addresses for owner-operators and RV owners?
Yes. We regularly test single rigs at home addresses across the region. We need flat, safe parking and a charged battery. Driveways, side yards, and quiet street parking all work if the truck fits legally and safely.
What does it cost?
Pricing depends on the test type, vehicle count, and your location. Mobile pricing is consistent across our coverage area. For multi-vehicle fleet visits, we offer volume pricing. Call (916) 538-7777 or use the booking form and we will give you a quote within an hour during business hours.
How are you different from a brick-and-mortar test station?
We come to you instead of you driving the truck to us. That saves fuel, tolls, dispatcher time, and lost revenue from a rig sitting in a queue. For fleets, it means you can stage 10 to 50 trucks in your yard and we handle them all in one visit. For owner-operators, it means no waiting in line and no taking a personal day.
What if my truck fails the test?
We tell you exactly what failed and why. For OBD failures, we point you to the specific diagnostic trouble code. For OVI failures, we explain whether it is a smoke threshold issue, a visual finding, or both. We can also recommend trusted diesel repair shops in the region. Once the issue is fixed, we come back and retest.
Are you actually CARB credentialed?
Yes. We are credentialed by the California Air Resources Board for both OBD testing and OVI opacity testing. Credentials are verifiable on the CARB Clean Truck Check program registry. We will provide credential numbers on request before any service visit.
Do you also handle BAR-OIS testing for lighter diesels?
Yes. For diesel-powered vehicles under 14,000 pounds GVWR, BAR-OIS testing applies and we are equipped for it. Tell us your vehicle when booking and we will confirm the right test type.
How do I book?
Call (916) 538-7777 or use the booking form below. Tell us the city, the vehicle count, the engine years, and your preferred window. We confirm availability and dispatch within business hours.

Book Sacramento Region mobile testing

Get a tester on your Sacramento Region site

Tell us about your vehicles. We respond within 2 hours during business hours.

Or call us directly at (916) 538-7777. We typically respond within 2 hours during business hours.

Ready for mobile CARB testing in Sacramento Region?

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