---
title: "Mobile Clean Truck Check Testers in California (2,543)"
description: "2,543 CARB-credentialed testers in California come to your yard for Clean Truck Check tests. Find mobile OBD and smoke opacity testers by county and city."
url: "https://ctcfinder.com/mobile-testers/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mobile Clean Truck Check testers in California

2,543 of 2,867 listed testing businesses offer mobile testing.

> 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.

## By county

- [Los Angeles County](https://ctcfinder.com/testers/los-angeles-county/) — 465 mobile
- [San Bernardino County](https://ctcfinder.com/testers/san-bernardino-county/) — 243 mobile
- [Riverside County](https://ctcfinder.com/testers/riverside-county/) — 233 mobile
- [San Diego County](https://ctcfinder.com/testers/san-diego-county/) — 157 mobile
- [Orange County](https://ctcfinder.com/testers/orange-county/) — 146 mobile
- [Sacramento County](https://ctcfinder.com/testers/sacramento-county/) — 118 mobile
- [San Joaquin County](https://ctcfinder.com/testers/san-joaquin-county/) — 111 mobile
- [Fresno County](https://ctcfinder.com/testers/fresno-county/) — 102 mobile
- [Kern County](https://ctcfinder.com/testers/kern-county/) — 89 mobile
- [Alameda County](https://ctcfinder.com/testers/alameda-county/) — 79 mobile
- [Santa Clara County](https://ctcfinder.com/testers/santa-clara-county/) — 67 mobile
- [Ventura County](https://ctcfinder.com/testers/ventura-county/) — 61 mobile
- [Tulare County](https://ctcfinder.com/testers/tulare-county/) — 53 mobile
- [Contra Costa County](https://ctcfinder.com/testers/contra-costa-county/) — 57 mobile
- [Stanislaus County](https://ctcfinder.com/testers/stanislaus-county/) — 47 mobile
- [Yolo County](https://ctcfinder.com/testers/yolo-county/) — 36 mobile
- [Merced County](https://ctcfinder.com/testers/merced-county/) — 35 mobile
- [Placer County](https://ctcfinder.com/testers/placer-county/) — 36 mobile
- [Solano County](https://ctcfinder.com/testers/solano-county/) — 34 mobile
- [Monterey County](https://ctcfinder.com/testers/monterey-county/) — 33 mobile
- [San Mateo County](https://ctcfinder.com/testers/san-mateo-county/) — 27 mobile
- [Santa Barbara County](https://ctcfinder.com/testers/santa-barbara-county/) — 30 mobile
- [Sonoma County](https://ctcfinder.com/testers/sonoma-county/) — 19 mobile
- [San Luis Obispo County](https://ctcfinder.com/testers/san-luis-obispo-county/) — 22 mobile
- [Butte County](https://ctcfinder.com/testers/butte-county/) — 20 mobile
- [Madera County](https://ctcfinder.com/testers/madera-county/) — 19 mobile
- [Humboldt County](https://ctcfinder.com/testers/humboldt-county/) — 16 mobile
- [Shasta County](https://ctcfinder.com/testers/shasta-county/) — 16 mobile
- [Santa Cruz County](https://ctcfinder.com/testers/santa-cruz-county/) — 15 mobile
- [El Dorado County](https://ctcfinder.com/testers/el-dorado-county/) — 16 mobile
- [Imperial County](https://ctcfinder.com/testers/imperial-county/) — 14 mobile
- [Kings County](https://ctcfinder.com/testers/kings-county/) — 11 mobile
- [Sutter County](https://ctcfinder.com/testers/sutter-county/) — 11 mobile
- [Tehama County](https://ctcfinder.com/testers/tehama-county/) — 7 mobile
- [Napa County](https://ctcfinder.com/testers/napa-county/) — 11 mobile
- [Calaveras County](https://ctcfinder.com/testers/calaveras-county/) — 8 mobile
- [Nevada County](https://ctcfinder.com/testers/nevada-county/) — 5 mobile
- [Yuba County](https://ctcfinder.com/testers/yuba-county/) — 6 mobile
- [Mendocino County](https://ctcfinder.com/testers/mendocino-county/) — 8 mobile
- [Siskiyou County](https://ctcfinder.com/testers/siskiyou-county/) — 6 mobile
- [San Benito County](https://ctcfinder.com/testers/san-benito-county/) — 6 mobile
- [Amador County](https://ctcfinder.com/testers/amador-county/) — 6 mobile
- [San Francisco County](https://ctcfinder.com/testers/san-francisco-county/) — 7 mobile
- [Colusa County](https://ctcfinder.com/testers/colusa-county/) — 6 mobile
- [Glenn County](https://ctcfinder.com/testers/glenn-county/) — 5 mobile
- [Lassen County](https://ctcfinder.com/testers/lassen-county/) — 4 mobile
- [Tuolumne County](https://ctcfinder.com/testers/tuolumne-county/) — 4 mobile
- [Marin County](https://ctcfinder.com/testers/marin-county/) — 3 mobile
- [Plumas County](https://ctcfinder.com/testers/plumas-county/) — 3 mobile
- [Lake County](https://ctcfinder.com/testers/lake-county/) — 3 mobile
- [Del Norte County](https://ctcfinder.com/testers/del-norte-county/) — 2 mobile
- [Modoc County](https://ctcfinder.com/testers/modoc-county/) — 2 mobile
- [Mono County](https://ctcfinder.com/testers/mono-county/) — 2 mobile
- [Mariposa County](https://ctcfinder.com/testers/mariposa-county/) — 1 mobile

## Businesses with several credentialed testers

- **[A&B Truck Repair, Inc.](https://ctcfinder.com/tester/a-and-b-truck-repair-inc-modesto-2/)** — 959 S 9th St, Modesto, CA 95351 — (209) 527-6971. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[A&G Safety Alliance](https://ctcfinder.com/tester/a-and-g-safety-alliance-los-angeles/)** — 951 South Ford Boulevard, Los Angeles, CA 90022 — (562) 572-6969. Services: mobile testing, OBD testing, motorhome testing.
- **[Aaron Cheever](https://ctcfinder.com/tester/aaron-cheever-yuba-city/)** — Yuba City, CA 95991 — (530) 671-5309. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Advance Fleet Solution](https://ctcfinder.com/tester/advance-fleet-solution-fontana/)** — 14947 Cerritos Pl, Fontana, CA 92336 — (626) 664-5239. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[AIRPASS Automated Testing Device by AIRLIMITS](https://ctcfinder.com/tester/airpass-automated-testing-device-by-airlimits-long-beach/)** — 65 Pine Avenue, Long Beach, CA 90802 — (800) 788-5241. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Alejandro Valenzuela](https://ctcfinder.com/tester/alejandro-valenzuela-calexico/)** — Calexico, CA 92231 — (760) 554-7600. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Arcadia Smog Test Only Center](https://ctcfinder.com/tester/arcadia-smog-test-only-center-arcadia/)** — 401 N 1st Ave, Arcadia, CA 91006 — (626) 447-1101. Services: mobile testing, OBD testing, motorhome testing.
- **[Big RIG Truck Repair and Towing](https://ctcfinder.com/tester/big-rig-truck-repair-and-towing-yuba-city/)** — 1275 Walnut Ave, Yuba City, CA 95991 — (530) 434-2242. Services: mobile testing, OBD testing.
- **[CalFleet](https://ctcfinder.com/tester/calfleet-cotati/)** — 7911 Redwood Dr Suite 131, Cotati, CA 94931 — (707) 665-5710. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[California Clean Truck Check](https://ctcfinder.com/tester/california-clean-truck-check-stockton/)** — 5250 Claremont Ave, Stockton, CA 95207 — (209) 636-7580. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[California Diesel Complaince](https://ctcfinder.com/tester/california-diesel-complaince-ontario/)** — 1609 S Grove Av #110, Ontario, CA 91761 — (909) 923-8622. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[California Fleet Compliance](https://ctcfinder.com/tester/california-fleet-compliance-oakland/)** — 717 26th St, Oakland, CA 94612 — (341) 213-8932. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[California Mobile CTC LLC - WE COME TO YOU](https://ctcfinder.com/tester/california-mobile-ctc-llc-we-come-to-you-fresno/)** — 1612 Fulton St, Fresno, CA 93721 — (559) 578-0357. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[CARB Emission Services INC](https://ctcfinder.com/tester/carb-emission-services-inc-carson/)** — 20850 Leapwood Ave, Carson, CA 90746 — (562) 625-0225. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carlos Jaimes Fuentes](https://ctcfinder.com/tester/carlos-jaimes-fuentes-farmersville/)** — Farmersville, CA 93223 — (559) 667-2669. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Diesel Specialist - Coton](https://ctcfinder.com/tester/clean-diesel-specialist-coton-colton/)** — 310 Rexford St, Colton, CA 92324 — (909) 430-0018. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Diesel Specialist Anaheim](https://ctcfinder.com/tester/clean-diesel-specialist-anaheim-anaheim/)** — 220 W Santa Ana St, Anaheim, CA 92805 — (562) 857-4241. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Truck Check Authority](https://ctcfinder.com/tester/clean-truck-check-authority-huntington-beach/)** — 16861 Beach Blvd, Huntington Beach, CA 92647 — (714) 603-3839. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cono's smog stop](https://ctcfinder.com/tester/conos-smog-stop-indio/)** — 82944 Avenue 44, Indio, CA 92201 — (760) 625-9721. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Corona Smog Center & Test Only](https://ctcfinder.com/tester/corona-smog-center-and-test-only-riverside/)** — 12690 Magnolia Ave, Riverside, CA 92503 — (951) 906-6793. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Danny Boys](https://ctcfinder.com/tester/danny-boys-woodland/)** — Woodland, CA 95776 — (530) 867-0231. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Darling Smog](https://ctcfinder.com/tester/darling-smog-glendora/)** — 743 W Route 66 #4, Glendora, CA 91740 — (626) 495-8835. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Emissions Service](https://ctcfinder.com/tester/diesel-emissions-service-mcclellan/)** — 4522 Parker Ave, Mcclellan, CA 95652 — (916) 473-7393. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Emissions Service](https://ctcfinder.com/tester/diesel-emissions-service-redding/)** — 16435 Clear Creek Rd, Redding, CA 96001 — (530) 241-2851. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Exhaust & Emissions](https://ctcfinder.com/tester/diesel-exhaust-and-emissions-santa-fe-springs/)** — 11039 Shoemaker Ave, Santa Fe Springs, CA 90670 — (562) 734-6302. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Exhaust & Emissions LLC](https://ctcfinder.com/tester/diesel-exhaust-and-emissions-llc-santa-fe-springs/)** — 11043 Shoemaker Ave, Santa Fe Springs, CA 90670 — (562) 682-5232. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Injection Service1](https://ctcfinder.com/tester/diesel-injection-service1-fontana/)** — 8482 Cherry Ave, Fontana, CA 92335 — (909) 213-5556. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Dogpatch Biofuels](https://ctcfinder.com/tester/dogpatch-biofuels-san-francisco/)** — San Francisco, CA 94107 — (415) 505-6517. Services: mobile testing, OBD testing.
- **[Donahue Truck Centers](https://ctcfinder.com/tester/donahue-truck-centers-santa-rosa/)** — 520 E Todd Rd, Santa Rosa, CA 95407 — (707) 975-5080. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Draco Trucks](https://ctcfinder.com/tester/draco-trucks-san-diego/)** — 7424 Mission Gorge Road, San Diego, CA 92120 — (619) 287-7300. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Emeraldauto](https://ctcfinder.com/tester/emeraldauto-san-rafael/)** — 20 Bridgegate Dr, San Rafael, CA 94903 — (415) 871-4148. Services: mobile testing, OBD testing, motorhome testing.
- **[Filthy Busters Inc.](https://ctcfinder.com/tester/filthy-busters-inc-redwood-city/)** — 1249 Sabrina Ct, Redwood City, CA 94061 — (510) 326-5901. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[FleetCrew Inc.](https://ctcfinder.com/tester/fleetcrew-inc-fontana/)** — 14264 Valley Blvd, Fontana, CA 92335 — (949) 627-4644. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[FleetCrew INC...](https://ctcfinder.com/tester/fleetcrew-inc-commerce/)** — 4164 East Washington Boulevard, Commerce, CA 90023 — (949) 627-4644. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[FleetReady Mobile Service](https://ctcfinder.com/tester/fleetready-mobile-service-hemet/)** — 41323 Johnston Ave, Hemet, CA 92544 — (951) 593-5117. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Holly Smog](https://ctcfinder.com/tester/holly-smog-san-carlos/)** — 501 Old County Rd Suite A, San Carlos, CA 94070 — (650) 595-1388. Services: mobile testing, OBD testing, motorhome testing.
- **[Homeland Fleet Services](https://ctcfinder.com/tester/homeland-fleet-services-rialto/)** — 775 W Rialto Ave, Rialto, CA 92376 — (888) 860-2195. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Homeland Fleet Services](https://ctcfinder.com/tester/homeland-fleet-services-woodland/)** — 14958 County Road 100B, Woodland, CA 95776 — (888) 860-2195. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[IJN mobile diesel](https://ctcfinder.com/tester/ijn-mobile-diesel-torrance/)** — 3649 Garnet Street, Torrance, CA 90503 — (424) 318-7780. Services: mobile testing, OBD testing, motorhome testing.
- **[In & Out Truck Repair Company](https://ctcfinder.com/tester/in-and-out-truck-repair-company-barstow/)** — 2441 W Main St, Barstow, CA 92311 — (760) 577-9544. Services: mobile testing, OBD testing.
- **[J.J.'s Smog](https://ctcfinder.com/tester/j-j-s-smog-oxnard/)** — 1281 S Oxnard Blvd, Oxnard, CA 93030 — (805) 216-5284. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jose M Vega Delgadillo](https://ctcfinder.com/tester/jose-m-vega-delgadillo-south-gate/)** — South Gate, CA 90280 — (213) 997-6523. Services: mobile testing, OBD testing.
- **[Jose Talavera](https://ctcfinder.com/tester/jose-talavera-colton/)** — Colton, CA 92324 — (562) 857-4241. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Juan Campos - Bulldog Towing](https://ctcfinder.com/tester/juan-campos-bulldog-towing-chula-vista/)** — 1590 W Frontage Road, Chula Vista, CA 91911 — (619) 244-6009. Services: mobile testing, OBD testing, motorhome testing.
- **[Maggiora Bro Drilling](https://ctcfinder.com/tester/maggiora-bro-drilling-gilroy/)** — Gilroy, CA 95020 — (669) 469-9223. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[MMM Emissions](https://ctcfinder.com/tester/mmm-emissions-rancho-cucamonga/)** — 9375 PLACER STREET RANCHO CUCAMUMGA CA 91730, Rancho Cucamonga, CA 91730 — (909) 819-8478. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mobile Compliance Testing](https://ctcfinder.com/tester/mobile-compliance-testing-sacramento/)** — 4361 Pell Dr Suite 400, Sacramento, CA 95838 — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mobile Diesel Emissions Testing Inc](https://ctcfinder.com/tester/mobile-diesel-emissions-testing-inc-loomis/)** — 4010 Barton Rd, Loomis, CA 95650 — (916) 530-2525. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mobile Testing](https://ctcfinder.com/tester/mobile-testing-anaheim/)** — 421 S Brookhurst St, Anaheim, CA 92804 — (424) 321-6044. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[OC Clean Truck LLC](https://ctcfinder.com/tester/oc-clean-truck-llc-orange/)** — Orange, CA 92867 — (714) 306-9803. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Orange High Test Only](https://ctcfinder.com/tester/orange-high-test-only-orange/)** — 896 N Cypress St, Orange, CA 92867 — (714) 289-1088. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Pape Kenworth Durham](https://ctcfinder.com/tester/pape-kenworth-durham-durham/)** — Durham, CA 95938 — (530) 893-8617. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Pass CTC](https://ctcfinder.com/tester/pass-ctc-rialto/)** — 1140 N Encina Ave, Rialto, CA 92376 — (909) 835-7360. Services: mobile testing, OBD testing, motorhome testing.
- **[Performance Pemf](https://ctcfinder.com/tester/performance-pemf-cazadero/)** — 1100 Old Duncans Grade Rd, Cazadero, CA 95421 — (707) 480-1646. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Performance Truck and Diesel](https://ctcfinder.com/tester/performance-truck-and-diesel-bakersfield/)** — 2429 Fruitvale Ave Suite 3, Bakersfield, CA 93308 — (661) 395-0882. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Piedra's Smog Test Only](https://ctcfinder.com/tester/piedras-smog-test-only-walnut/)** — 19939 Valley Blvd, Walnut, CA 91789 — (909) 869-8056. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Platinum Fleet & Fire Services](https://ctcfinder.com/tester/platinum-fleet-and-fire-services-riverside/)** — 2970 Myers St, Riverside, CA 92503 — (209) 298-3552. Services: mobile testing, OBD testing, motorhome testing.
- **[Precision Automotive Services](https://ctcfinder.com/tester/precision-automotive-services-napa/)** — 198 Soscol Ave, Napa, CA 94559 — (707) 912-9318. Services: mobile testing, OBD testing, motorhome testing.
- **[Precision CARB Testing](https://ctcfinder.com/tester/precision-carb-testing-jurupa-valley/)** — 9830 50th St, Jurupa Valley, CA 92509 — (951) 855-0092. Services: mobile testing, OBD testing, motorhome testing.
- **[Ramon Gutierrez](https://ctcfinder.com/tester/ramon-gutierrez-bakersfield/)** — Bakersfield, CA 93314 — (661) 304-9910. Services: mobile testing, OBD testing, motorhome testing.
- **[Rancho Suey Mechanical Services INC](https://ctcfinder.com/tester/rancho-suey-mechanical-services-inc-santa-maria/)** — 310 W. BETTERAVIA RD, Santa Maria, CA 93455 — (805) 680-8893. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Revix LLC](https://ctcfinder.com/tester/revix-llc-whittier/)** — 14614 Broadway, Whittier, CA 90604 — (562) 753-4564. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Rincon Truck Center INC.](https://ctcfinder.com/tester/rincon-truck-center-inc-san-clemente/)** — 114 Rincon Ct, San Clemente, CA 92672 — (949) 492-3520. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[RoadWrench Diesel](https://ctcfinder.com/tester/roadwrench-diesel-moreno-valley/)** — 25029 Graduar Ct, Moreno Valley, CA 92557 — (951) 501-3603. Services: mobile testing, OBD testing.
- **[Robert Nickel](https://ctcfinder.com/tester/robert-nickel-irvine/)** — Irvine, CA 92618 — (949) 837-8736. Services: mobile testing, OBD testing, motorhome testing.
- **[Route 66 Smog of Glendora](https://ctcfinder.com/tester/route-66-smog-of-glendora-glendora/)** — 200 East Route 66, Glendora, CA 91740 — (626) 335-2126. Services: mobile testing, OBD testing, motorhome testing.
- **[SD Heavy Truck & Equipment Repair](https://ctcfinder.com/tester/sd-heavy-truck-and-equipment-repair-lakeside/)** — 12067 Riverside Drive, Lakeside, CA 92040 — (619) 561-5317. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Sksmobilerv](https://ctcfinder.com/tester/sksmobilerv-riverside/)** — 16164 Krameria Ave, Riverside, CA 92504 — (213) 598-8462. Services: mobile testing, OBD testing, motorhome testing.
- **[SoCal Clean Truck Check Llc](https://ctcfinder.com/tester/socal-clean-truck-check-llc-ontario/)** — 1312 N El Dorado Av, Ontario, CA 91764 — (951) 256-6933. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Thermal Truck and RV](https://ctcfinder.com/tester/thermal-truck-and-rv-thermal/)** — 57100 Desert Cactus Dr, Thermal, CA 92274 — (760) 399-9773. Services: mobile testing, OBD testing, motorhome testing.
- **[TNT Services Inc](https://ctcfinder.com/tester/tnt-services-inc-hayward/)** — 2235 Dunn Rd, Hayward, CA 94545 — (510) 570-6257. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Total Multi Services INC](https://ctcfinder.com/tester/total-multi-services-inc-union-city/)** — 1780 Whipple Rd Suite 110, Union City, CA 94587 — (510) 767-7165. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Unified Truck Services Inc.](https://ctcfinder.com/tester/unified-truck-services-inc-gilroy/)** — 7370 Orchard Dr, Gilroy, CA 95020 — (408) 420-2866. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Velox Clean Truck Certification](https://ctcfinder.com/tester/velox-clean-truck-certification-bakersfield/)** — 4905 Oak Canyon Ct, Bakersfield, CA 93308 — (661) 625-7863. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Vnmobiletesting](https://ctcfinder.com/tester/vnmobiletesting-la-habra/)** — 501 North Harbor Boulevard, La Habra, CA 90631 — (714) 397-8025. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[VNsocalmobile](https://ctcfinder.com/tester/vnsocalmobile-fullerton/)** — 1440 N Harbor Blvd, Fullerton, CA 92835 — (657) 500-9235. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Yong Hu](https://ctcfinder.com/tester/yong-hu-fremont/)** — Fremont, CA 94536 — (626) 955-9566. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Zippy Truck Repairs - Hesperia.](https://ctcfinder.com/tester/zippy-truck-repairs-hesperia-hesperia/)** — 8899 Three Flags Ave, Hesperia, CA 92345 — (949) 627-4644. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.