--- title: "Clean Truck Check Testers in Fairfield, CA (11 listed)" description: "Find 11 CARB-credentialed Clean Truck Check testers in Fairfield, Solano County: 10 offer mobile testing, 6 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/solano-county/fairfield/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Fairfield, CA 11 testing businesses in Fairfield (Solano County) are on CARB's public Clean Truck Check tester list (11 credentialed testers). 10 offer mobile testing, 6 do smoke opacity tests, 8 test motorhomes. > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. ## Testers in Fairfield - **[Ajmer Shergill](https://ctcfinder.com/tester/ajmer-shergill-fairfield/)** — Fairfield, CA 94534 — (707) 227-6194. Services: mobile testing, OBD testing. - **[California CTC Mobile Testing](https://ctcfinder.com/tester/california-ctc-mobile-testing-fairfield/)** — 5328 Venus Dr, Fairfield, CA 94534 — (707) 761-4000. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Chris Casilang](https://ctcfinder.com/tester/chris-casilang-fairfield/)** — Fairfield, CA 94534 — (707) 205-6922. Services: OBD testing, smoke opacity (non-OBD) testing. - **[Elite Truck & trailer Repair LLC](https://ctcfinder.com/tester/elite-truck-and-trailer-repair-llc-fairfield/)** — 505 Watt Dr Suite 5, Fairfield, CA 94534 — (707) 310-9779. Services: mobile testing, OBD testing, motorhome testing. - **[Golden State Emissions Pro](https://ctcfinder.com/tester/golden-state-emissions-pro-fairfield/)** — 4776 Opus Cir, Fairfield, CA 94534 — (707) 373-7897. Services: mobile testing, OBD testing, motorhome testing. - **[Lucky Tires and Repair Services](https://ctcfinder.com/tester/lucky-tires-and-repair-services-fairfield/)** — 5201 WB Goodman Ln, Fairfield, CA 94533 — (707) 439-5797. Services: mobile testing, OBD testing. - **[Mobile Testing](https://ctcfinder.com/tester/mobile-testing-fairfield/)** — Fairfield, CA 94533 — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Testing](https://ctcfinder.com/tester/mobile-testing-fairfield-2/)** — Fairfield, CA 94534 — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[North Bay Truck Certer](https://ctcfinder.com/tester/north-bay-truck-certer-fairfield/)** — 1245 Illinois St, Fairfield, CA 94533 — (707) 718-8596. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Sohal Truck & Tires](https://ctcfinder.com/tester/sohal-truck-and-tires-fairfield/)** — 393 Watt Dr, Fairfield, CA 94534 — (707) 208-3032. Services: mobile testing, OBD testing, motorhome testing. - **[Speed Road service inc](https://ctcfinder.com/tester/speed-road-service-inc-fairfield/)** — 1150 frost place, Fairfield, CA 94533 — (707) 880-0667. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[Boyds Fleet Repair](https://ctcfinder.com/tester/boyds-fleet-repair-suisun-city/)** — 1434 Langley Way, Suisun City, CA 94585 — (707) 974-6261 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Tommy Bowen](https://ctcfinder.com/tester/tommy-bowen-vacaville/)** — Vacaville, CA 95687 — (707) 330-2331 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Golden West Smog](https://ctcfinder.com/tester/golden-west-smog-benicia/)** — 4592 E 2nd St Suite D, Benicia, CA 94510 — (707) 342-5075 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Nor Cal Truck Sales & Mfg.](https://ctcfinder.com/tester/nor-cal-truck-sales-and-mfg-benicia/)** — 200 Industrial Way, Benicia, CA 94510 — (925) 787-9735 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Hector Kreitz](https://ctcfinder.com/tester/hector-kreitz-napa/)** — Napa, CA 94558 — (707) 704-9863 — 11 mi. Services: mobile testing, OBD testing. - **[JB Mobile Service](https://ctcfinder.com/tester/jb-mobile-service-napa/)** — 787 Airpark Rd, Napa, CA 94558 — (707) 206-5358 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Napa Valley RV and Truck](https://ctcfinder.com/tester/napa-valley-rv-and-truck-napa/)** — 26 Big Leaf Ct, Napa, CA 94558 — (707) 850-6624 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Napa Valley Unified School District](https://ctcfinder.com/tester/napa-valley-unified-school-district-napa/)** — 1340 Menlo Ave, Napa, CA 94558 — (707) 492-0366 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[David Hartfield III](https://ctcfinder.com/tester/david-hartfield-iii-vallejo/)** — Vallejo, CA 94591 — (510) 707-3344 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[DDK Enterprises INC](https://ctcfinder.com/tester/ddk-enterprises-inc-vallejo/)** — 8012 Vertine Ct, Vallejo, CA 94591 — (510) 563-7016 — 11 mi. Services: mobile testing, OBD testing. - **[Primos Mobile Truck & RV Testing](https://ctcfinder.com/tester/primos-mobile-truck-and-rv-testing-vallejo/)** — 1127 Belmont Ave, Vallejo, CA 94591 — (707) 310-1367 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[All Sacramento/Bay Area](https://ctcfinder.com/tester/all-sacramento-bay-area-vacaville/)** — Vacaville, CA 95688 — (916) 243-5089 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Fairfield? CTC Finder lists 11 testing businesses in Fairfield from CARB's public tester list (11 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher. ### Is there mobile Clean Truck Check testing in Fairfield? Yes. 10 listed businesses in Fairfield offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them. ### How much does a Clean Truck Check test cost in Fairfield? Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). ## Nearby cities - [Napa](https://ctcfinder.com/testers/napa-county/napa/) — 11 listings, 10 mi - [Vacaville](https://ctcfinder.com/testers/solano-county/vacaville/) — 6 listings, 11 mi - [Vallejo](https://ctcfinder.com/testers/solano-county/vallejo/) — 8 listings, 13 mi - [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) — 5 listings, 19 mi - [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) — 7 listings, 20 mi - [Martinez](https://ctcfinder.com/testers/contra-costa-county/martinez/) — 7 listings, 20 mi - [Dixon](https://ctcfinder.com/testers/solano-county/dixon/) — 8 listings, 20 mi - [Sonoma](https://ctcfinder.com/testers/sonoma-county/sonoma/) — 5 listings, 21 mi - [Winters](https://ctcfinder.com/testers/yolo-county/winters/) — 4 listings, 22 mi - [San Pablo](https://ctcfinder.com/testers/contra-costa-county/san-pablo/) — 7 listings, 24 mi