--- title: "Clean Truck Check Testers in King City, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in King City, Monterey County: 3 offer mobile testing, 0 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/monterey-county/king-city/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in King City, CA 3 testing businesses in King City (Monterey County) are on CARB's public Clean Truck Check tester list (3 credentialed testers). 3 offer mobile testing, 0 do smoke opacity tests, 2 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 King City - **[County Line Diesel & Tractor Service](https://ctcfinder.com/tester/county-line-diesel-and-tractor-service-king-city/)** — 129 Divina Way, King City, CA 93930 — (831) 225-8654. Services: mobile testing, OBD testing. - **[Mobile Fleet Emissions](https://ctcfinder.com/tester/mobile-fleet-emissions-king-city/)** — 1303 Cambridge Ave, King City, CA 93930 — (831) 206-7950. Services: mobile testing, OBD testing, motorhome testing. - **[Soledad Truck and Auto Repair](https://ctcfinder.com/tester/soledad-truck-and-auto-repair-king-city/)** — 730 S 1st St, King City, CA 93930 — (831) 315-0556. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[JM Diesel Solutions](https://ctcfinder.com/tester/jm-diesel-solutions-greenfield/)** — 792 Cherry Ave, Greenfield, CA 93927 — (831) 585-8927 — 18 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Express Truck and Trailer Services](https://ctcfinder.com/tester/express-truck-and-trailer-services-soledad/)** — 149 Nestles Rd, Soledad, CA 93960 — (831) 705-9207 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jose Diaz](https://ctcfinder.com/tester/jose-diaz-soledad/)** — Soledad, CA 93960 — (831) 821-0165 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Premier Smogs](https://ctcfinder.com/tester/premier-smogs-soledad/)** — 801 Front St, Soledad, CA 93960 — (831) 305-3969 — 20 mi. Services: mobile testing, OBD testing, motorhome testing. ## Trucking in King City Monterey County's Salinas Valley produce industry relies on agricultural and refrigerated trucks. ## 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 King City? CTC Finder lists 3 testing businesses in King City from CARB's public tester list (3 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 King City? Yes. 3 listed businesses in King City 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 King City? 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 - [Soledad](https://ctcfinder.com/testers/monterey-county/soledad/) — 3 listings, 20 mi - [Gonzales](https://ctcfinder.com/testers/monterey-county/gonzales/) — 3 listings, 29 mi