--- title: "Clean Truck Check Testers in Watsonville, CA (10 listed)" description: "Find 10 CARB-credentialed Clean Truck Check testers in Watsonville, Santa Cruz County: 8 offer mobile testing, 4 do smoke opacity tests. Phone numbers…" url: "https://ctcfinder.com/testers/santa-cruz-county/watsonville/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Watsonville, CA 10 testing businesses in Watsonville (Santa Cruz County) are on CARB's public Clean Truck Check tester list (10 credentialed testers). 8 offer mobile testing, 4 do smoke opacity tests, 10 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 Watsonville - **[Alex Lopez](https://ctcfinder.com/tester/alex-lopez-watsonville/)** — Watsonville, CA 95076 — (831) 566-1827. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Best Service Automotive & Truck Repair](https://ctcfinder.com/tester/best-service-automotive-and-truck-repair-watsonville/)** — 18 Walker St, Watsonville, CA 95076 — (831) 353-1533. Services: mobile testing, OBD testing, motorhome testing. - **[Crafton’s smog check](https://ctcfinder.com/tester/craftons-smog-check-watsonville/)** — 771 Freedom Blvd, Watsonville, CA 95076 — (831) 227-3766. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Daniel Dye](https://ctcfinder.com/tester/daniel-dye-watsonville/)** — Watsonville, CA 95076 — (831) 713-8935. Services: mobile testing, OBD testing, motorhome testing. - **[Easy Tune Up 95$](https://ctcfinder.com/tester/easy-tune-up-95-watsonville/)** — 469 Union St, Watsonville, CA 95076 — (831) 535-8373. Services: mobile testing, OBD testing, motorhome testing. - **[Juan Calles](https://ctcfinder.com/tester/juan-calles-watsonville/)** — Watsonville, CA 95076 — (831) 212-5327. Services: mobile testing, OBD testing, motorhome testing. - **[MAC Auto Repair LLC](https://ctcfinder.com/tester/mac-auto-repair-llc-watsonville/)** — 499 Auto Center Dr Ste b, Watsonville, CA 95076 — (831) 254-7061. Services: OBD testing, motorhome testing. - **[Megan Lopez](https://ctcfinder.com/tester/megan-lopez-watsonville/)** — Watsonville, CA 95076 — (831) 331-0083. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[National trucks](https://ctcfinder.com/tester/national-trucks-watsonville/)** — 130 Lee Rd, Watsonville, CA 95076 — (831) 786-5100. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Wheeler Performance & Solutions](https://ctcfinder.com/tester/wheeler-performance-and-solutions-watsonville/)** — 220 Paloma Way, Watsonville, CA 95076 — (831) 840-0773. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Betos mobile & truck services LLC](https://ctcfinder.com/tester/betos-mobile-and-truck-services-llc-royal-oaks/)** — 415 Hall Rd, Royal Oaks, CA 95076 — (831) 247-0392 — 1 mi. Services: mobile testing, OBD testing. - **[The Company](https://ctcfinder.com/tester/the-company-moss-landing/)** — 1450 Salinas Rd, Moss Landing, CA 95039 — (831) 682-6876 — 8 mi. Services: mobile testing, OBD testing. - **[Santana paving and grading inc mobile](https://ctcfinder.com/tester/santana-paving-and-grading-inc-mobile-soquel/)** — 3912 Mainsail Pl, Soquel, CA 95073 — (831) 970-5420 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[The Truck Inspector, LLC](https://ctcfinder.com/tester/the-truck-inspector-llc-soquel/)** — 999 Old San Jose Rd SF BAY AREA, Soquel, CA 95073 — (831) 332-2272 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[B&L Truck and Tractor Repair](https://ctcfinder.com/tester/b-and-l-truck-and-tractor-repair-gilroy/)** — 8594 Forest St, Gilroy, CA 95020 — (831) 889-8611 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Cruz Tire & Truck Repair](https://ctcfinder.com/tester/cruz-tire-and-truck-repair-gilroy/)** — 5870 Monterey Rd A, Gilroy, CA 95020 — (909) 533-0433 — 12 mi. Services: mobile testing, OBD testing. - **[Dhillon CARB Testing](https://ctcfinder.com/tester/dhillon-carb-testing-gilroy/)** — 1125 Violet Way, Gilroy, CA 95020 — (408) 775-9600 — 12 mi. Services: mobile testing, OBD testing. - **[Maggiora Bro Drilling](https://ctcfinder.com/tester/maggiora-bro-drilling-gilroy/)** — Gilroy, CA 95020 — (669) 469-9223 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mateo Huerta](https://ctcfinder.com/tester/mateo-huerta-gilroy/)** — Gilroy, CA 95020 — (650) 290-0652 — 12 mi. Services: mobile testing, OBD testing. - **[Mosher Equipment Services LLC](https://ctcfinder.com/tester/mosher-equipment-services-llc-gilroy/)** — 1290 Masten Ave, Gilroy, CA 95020 — (408) 660-5693 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Premier Diesel LLC](https://ctcfinder.com/tester/premier-diesel-llc-gilroy/)** — 6484 Automall Pkwy, Gilroy, CA 95020 — (408) 842-2999 — 12 mi. Services: OBD testing. - **[Prime Smog Check & Repair LLC](https://ctcfinder.com/tester/prime-smog-check-and-repair-llc-gilroy/)** — 505 Mayock Rd Suite E-17, Gilroy, CA 95020 — (408) 337-1547 — 12 mi. Services: mobile testing, 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 Watsonville? CTC Finder lists 10 testing businesses in Watsonville from CARB's public tester list (10 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 Watsonville? Yes. 8 listed businesses in Watsonville 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 Watsonville? 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 - [Gilroy](https://ctcfinder.com/testers/santa-clara-county/gilroy/) — 13 listings, 12 mi - [Morgan Hill](https://ctcfinder.com/testers/santa-clara-county/morgan-hill/) — 6 listings, 13 mi - [Santa Cruz](https://ctcfinder.com/testers/santa-cruz-county/santa-cruz/) — 3 listings, 15 mi - [Salinas](https://ctcfinder.com/testers/monterey-county/salinas/) — 21 listings, 19 mi - [Hollister](https://ctcfinder.com/testers/san-benito-county/hollister/) — 7 listings, 24 mi - [Campbell](https://ctcfinder.com/testers/santa-clara-county/campbell/) — 3 listings, 26 mi - [Monterey](https://ctcfinder.com/testers/monterey-county/monterey/) — 3 listings, 27 mi - [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) — 41 listings, 27 mi - [Santa Clara](https://ctcfinder.com/testers/santa-clara-county/santa-clara/) — 3 listings, 33 mi - [Milpitas](https://ctcfinder.com/testers/santa-clara-county/milpitas/) — 3 listings, 35 mi