--- title: "Clean Truck Check Testers in Vallejo, CA (8 listed)" description: "Find 8 CARB-credentialed Clean Truck Check testers in Vallejo, Solano County: 7 offer mobile testing, 2 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/solano-county/vallejo/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Vallejo, CA 8 testing businesses in Vallejo (Solano County) are on CARB's public Clean Truck Check tester list (8 credentialed testers). 7 offer mobile testing, 2 do smoke opacity tests, 5 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 Vallejo - **[David Hartfield III](https://ctcfinder.com/tester/david-hartfield-iii-vallejo/)** — Vallejo, CA 94591 — (510) 707-3344. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Days Smog& DMV Registration Services](https://ctcfinder.com/tester/days-smog-and-dmv-registration-services-vallejo/)** — 1624 Broadway St, Vallejo, CA 94590 — (707) 997-0420. Services: mobile testing, OBD testing, motorhome testing. - **[DDK Enterprises INC](https://ctcfinder.com/tester/ddk-enterprises-inc-vallejo/)** — 8012 Vertine Ct, Vallejo, CA 94591 — (510) 563-7016. Services: mobile testing, OBD testing. - **[ECS Mobile Services](https://ctcfinder.com/tester/ecs-mobile-services-vallejo/)** — 179 Coloma Way, Vallejo, CA 94589 — (707) 398-8574. Services: mobile testing, OBD testing, motorhome testing. - **[Michael's Transportation Service Inc.](https://ctcfinder.com/tester/michaels-transportation-service-inc-vallejo/)** — 140 Yolano Dr, Vallejo, CA 94589 — (707) 712-6713. Services: not listed. - **[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. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Touch Trucking LLC](https://ctcfinder.com/tester/touch-trucking-llc-vallejo/)** — 301 Greenfield Ave, Vallejo, CA 94590 — (510) 496-1005. Services: mobile testing, OBD testing. - **[Vallejo Smog Dog](https://ctcfinder.com/tester/vallejo-smog-dog-vallejo/)** — 1921 Sonoma Blvd, Vallejo, CA 94590 — (707) 557-7664. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Golden West Smog](https://ctcfinder.com/tester/golden-west-smog-benicia/)** — 4592 E 2nd St Suite D, Benicia, CA 94510 — (707) 342-5075 — 6 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 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Michael Siverson](https://ctcfinder.com/tester/michael-siverson-rodeo/)** — Rodeo, CA 94572 — (510) 672-1557 — 7 mi. Services: mobile testing, OBD testing. - **[Hercules CTC Clean Truck Check & Bit Inspection LL](https://ctcfinder.com/tester/hercules-ctc-clean-truck-check-and-bit-inspection-ll-hercules/)** — 205 Ridgeview Ter, Hercules, CA 94547 — (510) 375-2397 — 8 mi. Services: mobile testing, OBD testing. - **[Aaron Ramo](https://ctcfinder.com/tester/aaron-ramo-napa/)** — Napa, CA 94559 — (707) 225-7982 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jones Family Mobile Diesel Repair](https://ctcfinder.com/tester/jones-family-mobile-diesel-repair-napa/)** — 933 Water St, Napa, CA 94559 — (410) 301-8518 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Testing](https://ctcfinder.com/tester/mobile-testing-napa/)** — Napa, CA 94559 — (916) 538-7777 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Precision Automotive Services](https://ctcfinder.com/tester/precision-automotive-services-napa/)** — 198 Soscol Ave, Napa, CA 94559 — (707) 912-9318 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Quick Smog](https://ctcfinder.com/tester/quick-smog-napa/)** — 662 Soscol Ave, Napa, CA 94559 — (707) 927-3956 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Steve DiPiero](https://ctcfinder.com/tester/steve-dipiero-napa/)** — Napa, CA 94559 — (707) 996-3685 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Williams Transmissions and Express Smog](https://ctcfinder.com/tester/williams-transmissions-and-express-smog-napa/)** — 238 Soscol Ave, Napa, CA 94559 — (707) 310-1999 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Ajmer Shergill](https://ctcfinder.com/tester/ajmer-shergill-fairfield/)** — Fairfield, CA 94534 — (707) 227-6194 — 10 mi. Services: mobile testing, OBD 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 Vallejo? CTC Finder lists 8 testing businesses in Vallejo from CARB's public tester list (8 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 Vallejo? Yes. 7 listed businesses in Vallejo 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 Vallejo? 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 - [Martinez](https://ctcfinder.com/testers/contra-costa-county/martinez/) — 7 listings, 10 mi - [San Pablo](https://ctcfinder.com/testers/contra-costa-county/san-pablo/) — 7 listings, 11 mi - [Fairfield](https://ctcfinder.com/testers/solano-county/fairfield/) — 11 listings, 13 mi - [Napa](https://ctcfinder.com/testers/napa-county/napa/) — 11 listings, 13 mi - [Richmond](https://ctcfinder.com/testers/contra-costa-county/richmond/) — 3 listings, 14 mi - [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) — 7 listings, 15 mi - [Sonoma](https://ctcfinder.com/testers/sonoma-county/sonoma/) — 5 listings, 16 mi - [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) — 5 listings, 18 mi - [Vacaville](https://ctcfinder.com/testers/solano-county/vacaville/) — 6 listings, 23 mi - [Oakland](https://ctcfinder.com/testers/alameda-county/oakland/) — 15 listings, 23 mi