Mobile CARB Clean Truck Check across Fairfield, Vacaville, Vallejo and Napa. We test diesel trucks at your yard, distribution dock, winery or job site. No travel fees, no station trips.
The North Bay and Solano region is where Bay Area freight meets wine country. The I-80 spine through Vallejo, Fairfield and Vacaville is lined with big-box distribution centers and biotech, while Highway 29 runs the length of the Napa Valley and its ag and winery fleets. We bring CARB Clean Truck Check testing to all of it across Solano County (Fairfield, Vacaville, Vallejo, Benicia, Suisun City, Dixon) and Napa County (Napa, American Canyon, St. Helena).
Any diesel vehicle over 14,000 lbs GVWR needs a Clean Truck Check, and we save you the trip. Whether your trucks sit at a Vacaville DC off I-505, run auto-haul out of the Port of Benicia, support operations near Travis Air Force Base, or haul grapes in the hills above St. Helena, we come to you. Check your VIN status first at carbcleantruckcheck.app, then call to book.
Same price in downtown Vallejo or up Highway 29 in Napa — no travel fees, no facility charges.
On-board diagnostics test for 2013-and-newer diesel engines. Fast plug-in, results uploaded to CARB.
Opacity / visual inspection tier of Clean Truck Check. Call and we'll confirm the right test for your truck.
Snap-acceleration smoke opacity test for 2012-and-older diesel engines that can't run OBD.
Mobile diesel motorhome testing at your driveway, storage lot or RV park.
Running a distribution or wine-country fleet? Call 916-890-4427 for fleet pricing → See the full Clean Truck Check rates.
If your diesel engine is 2013 model year or newer, it has an on-board diagnostics port. We plug in, pull the emissions data and submit it to CARB. Most newer distribution tractors and box trucks are done in minutes.
If your engine is 2012 or older, there's no OBD data to read, so it gets a SAE J1667 snap-acceleration smoke opacity test instead — common on older winery and ag haulers. Not sure which applies? Call and read us the engine year.
Vacaville and Fairfield sit on the I-80 freight spine with big-box DCs and biotech logistics. We test box trucks and tractors right at the loading dock off I-80 and I-505.
Wineries and vineyard operations along Highway 29 from Napa to St. Helena run delivery and ag trucks — many older engines that need J1667 smoke testing. We come to the estate.
Auto-haul and drayage trucks moving imports through the Port of Benicia and along I-680 get tested on-site between loads — no Benicia-Martinez Bridge round trips.
Defense contractors and support fleets around Travis Air Force Base and Fairfield stay compliant with scheduled on-site testing and PO billing.
Dump trucks, water trucks and farm haulers across Solano — Dixon, Suisun City, Rio Vista — tested at the job site or the ranch.
One truck parked at home in Vallejo, American Canyon or Suisun City? We'll come to your house or a nearby lot. No fleet required.
Primary cities below, plus the surrounding Solano and Napa County towns. Don't see yours? Call — we likely cover it.
We test 7 days a week, including Saturdays, with early-morning and evening appointments so trucks aren't sitting idle during a paying shift. Distribution running on a night dock schedule or a winery in the middle of crush — tell us when the truck is parked and we'll work around it. Same-week and next-day slots are usually available across the North Bay and Solano.
Yes. A lot of vineyard and winery haulers run pre-2013 engines, which means a SAE J1667 smoke opacity test rather than OBD. We drive up Highway 29 to the estate or ranch and test on-site — no hauling old equipment down the valley.
We do it regularly. Line the trucks up at your Vacaville or Fairfield DC and we'll run them back-to-back at the dock between routes, so nobody comes off dispatch to sit at a station.
Not at all. This zone covers both counties. Whether the trucks are in Vallejo, Fairfield, Benicia or up in Napa and American Canyon, it's one call and one crew.
We cover the neighboring regions too. Jump to the nearest zone:
Call or text to schedule mobile CARB Clean Truck Check testing at your location — Fairfield, Vacaville, Vallejo or Napa. Fleet pricing available.
