--- title: "Clean Truck Check Testers in Ontario, CA (31 listed)" description: "Find 31 CARB-credentialed Clean Truck Check testers in Ontario, San Bernardino County: 30 offer mobile testing, 15 do smoke opacity tests. Phone numbers…" url: "https://ctcfinder.com/testers/san-bernardino-county/ontario/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Ontario, CA 31 testing businesses in Ontario (San Bernardino County) are on CARB's public Clean Truck Check tester list (33 credentialed testers). 30 offer mobile testing, 15 do smoke opacity tests, 24 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 Ontario - **[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. - **[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. - **[Aaron Davis -CLEAN TRUCK MOBILE TESTERS](https://ctcfinder.com/tester/aaron-davis-clean-truck-mobile-testers-ontario/)** — 2632 E Harlow Ln, Ontario, CA 91762 — (310) 345-7661. Services: mobile testing, OBD testing, motorhome testing. - **[Andrew Gallegos](https://ctcfinder.com/tester/andrew-gallegos-ontario/)** — Ontario, CA 91764 — (909) 919-4606. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Avid Smog, Inc](https://ctcfinder.com/tester/avid-smog-inc-ontario/)** — 1409 W Holt Bl, Ontario, CA 91762 — (909) 292-6926. Services: mobile testing, OBD testing. - **[Brandon Hitchcock](https://ctcfinder.com/tester/brandon-hitchcock-ontario/)** — Ontario, CA 91761 — (562) 367-9638. Services: mobile testing, OBD testing, motorhome testing. - **[Brian Tran](https://ctcfinder.com/tester/brian-tran-ontario/)** — Ontario, CA 91762 — (714) 417-3611. Services: OBD testing. - **[Carlos Pinal](https://ctcfinder.com/tester/carlos-pinal-ontario/)** — Ontario, CA 91762 — (626) 620-3167. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Cctv INC](https://ctcfinder.com/tester/cctv-inc-ontario/)** — 2025 S Milliken Ave, Ontario, CA 91761 — (626) 670-0779. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Chevez Wilber](https://ctcfinder.com/tester/chevez-wilber-ontario/)** — Ontario, CA 91762 — (323) 448-5771. Services: mobile testing, OBD testing, motorhome testing. - **[Cmax Commercial maintenance](https://ctcfinder.com/tester/cmax-commercial-maintenance-ontario/)** — 316 N Corona Ave, Ontario, CA 91764 — (909) 926-1389. Services: mobile testing, OBD testing. - **[Eddie Casarez](https://ctcfinder.com/tester/eddie-casarez-ontario/)** — Ontario, CA 91761 — (909) 730-5600. Services: mobile testing, OBD testing, motorhome testing. - **[Eric Alfaro](https://ctcfinder.com/tester/eric-alfaro-ontario/)** — Ontario, CA 91761 — (909) 808-1932. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Finish solutions](https://ctcfinder.com/tester/finish-solutions-ontario/)** — 1538 E Cherry Hill St, Ontario, CA 91761 — (909) 816-1592. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Gl Welding and Repair](https://ctcfinder.com/tester/gl-welding-and-repair-ontario/)** — 1525 S Briar Av, Ontario, CA 91762 — (626) 374-3357. Services: mobile testing, OBD testing, motorhome testing. - **[Isaac Quintanilla](https://ctcfinder.com/tester/isaac-quintanilla-ontario/)** — Ontario, CA 91761 — (909) 636-7614. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jose Francisco Mejia](https://ctcfinder.com/tester/jose-francisco-mejia-ontario/)** — Ontario, CA 91761 — (562) 221-1944. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Juan Zamora](https://ctcfinder.com/tester/juan-zamora-ontario/)** — Ontario, CA 91762 — (909) 331-9442. Services: mobile testing, OBD testing. - **[Kelcey Thomas](https://ctcfinder.com/tester/kelcey-thomas-ontario/)** — Ontario, CA 91761 — (909) 542-0495. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[MMM Mobile Emissions](https://ctcfinder.com/tester/mmm-mobile-emissions-ontario/)** — 3942 Colorado River Rd, Ontario, CA 91761 — (909) 919-8478. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile 2u Fleet Service LLC](https://ctcfinder.com/tester/mobile-2u-fleet-service-llc-ontario/)** — 337 N Vineyard Ave, Ontario, CA 91764 — (209) 424-4921. Services: mobile testing, OBD testing. - **[Mobile Fleet Test](https://ctcfinder.com/tester/mobile-fleet-test-ontario/)** — 1276 E Flora St, Ontario, CA 91764 — (909) 503-2811. Services: mobile testing, OBD testing, motorhome testing. - **[Mobile Smoke Check](https://ctcfinder.com/tester/mobile-smoke-check-ontario/)** — 760 E Francis St #L, Ontario, CA 91761 — (909) 376-6491. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[MVPS Consultants](https://ctcfinder.com/tester/mvps-consultants-ontario/)** — Ontario, CA 91764 — (909) 781-0546. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Ontario Smog](https://ctcfinder.com/tester/ontario-smog-ontario/)** — 152 N Mountain Av, Ontario, CA 91762 — (951) 473-0405. Services: mobile testing, OBD testing, motorhome testing. - **[Pascal & Ludwig Equip Co](https://ctcfinder.com/tester/pascal-and-ludwig-equip-co-ontario/)** — 2049 E Francis St, Ontario, CA 91761 — (909) 706-7674. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Pestrada Clean Truck Check](https://ctcfinder.com/tester/pestrada-clean-truck-check-ontario/)** — Ontario, CA 91762 — (818) 296-7698. Services: mobile testing, OBD testing, motorhome testing. - **[Raul Martinez](https://ctcfinder.com/tester/raul-martinez-ontario/)** — Ontario, CA 91762 — (818) 426-8244. Services: mobile testing, OBD testing, motorhome testing. - **[Tony Arellano](https://ctcfinder.com/tester/tony-arellano-ontario/)** — Ontario, CA 91762 — (562) 552-0296. Services: mobile testing, OBD testing. - **[Vsolve REG LLC](https://ctcfinder.com/tester/vsolve-reg-llc-ontario/)** — 4295 Jurupa St, SUITE 111 Bldg A, Ontario, CA 91761 — (951) 768-0333. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Waynes Automotve](https://ctcfinder.com/tester/waynes-automotve-ontario/)** — Ontario, CA 91762 — (909) 239-2288. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Center Lane Transportation, LLC](https://ctcfinder.com/tester/center-lane-transportation-llc-rancho-cucamonga/)** — Rancho Cucamonga, CA 91730 — (619) 598-6998 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[DSK Trucking Solutions Inc](https://ctcfinder.com/tester/dsk-trucking-solutions-inc-rancho-cucamonga/)** — Rancho Cucamonga, CA 91730 — (909) 755-9618 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Heriberto Eddie Casarez](https://ctcfinder.com/tester/heriberto-eddie-casarez-rancho-cucamonga/)** — Rancho Cucamonga, CA 91730 — (909) 730-5600 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Jayden Russell](https://ctcfinder.com/tester/jayden-russell-rancho-cucamonga/)** — Rancho Cucamonga, CA 91730 — (818) 406-8141 — 4 mi. Services: not listed. - **[MMM Emissions](https://ctcfinder.com/tester/mmm-emissions-rancho-cucamonga/)** — 9375 PLACER STREET RANCHO CUCAMUMGA CA 91730, Rancho Cucamonga, CA 91730 — (909) 819-8478 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[RH Mobile Truck & Trailer Repair](https://ctcfinder.com/tester/rh-mobile-truck-and-trailer-repair-rancho-cucamonga/)** — 9345 Calle Vejar, Rancho Cucamonga, CA 91730 — (951) 285-4546 — 4 mi. Services: mobile testing, OBD testing. - **[Seven Star Carrier](https://ctcfinder.com/tester/seven-star-carrier-rancho-cucamonga/)** — 9556 Bluewater Pl, Rancho Cucamonga, CA 91730 — (909) 694-8426 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Allen Halbert](https://ctcfinder.com/tester/allen-halbert-upland/)** — Upland, CA 91786 — (909) 222-7009 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Carlos N/A](https://ctcfinder.com/tester/carlos-n-a-upland/)** — 154 W Foothill Blvd, Upland, CA 91786 — (909) 767-1720 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Foothill Quicky smog](https://ctcfinder.com/tester/foothill-quicky-smog-upland/)** — 2016 W Foothill Blvd, Upland, CA 91786 — (626) 343-6623 — 4 mi. Services: OBD testing, motorhome testing. - **[Foothill Quicky Smog](https://ctcfinder.com/tester/foothill-quicky-smog-upland-2/)** — 2016 W Foothill Blvd Suite B, Upland, CA 91786 — (760) 524-4254 — 4 mi. Services: OBD testing, motorhome testing. - **[Foothill Quicky Smog 2](https://ctcfinder.com/tester/foothill-quicky-smog-2-upland/)** — 903 N Central Ave F, Upland, CA 91786 — (909) 969-4443 — 4 mi. Services: OBD testing, motorhome testing. ## Trucking in Ontario Ontario combines the ONT air-cargo airport with dense distribution-center blocks south of I-10 and along the 60. The Inland Empire holds roughly a billion square feet of warehouse space (Pitzer College estimate), so local fleets and owner-operators run a high volume of tests. Mobile testers who visit distribution centers and truck yards are common here. San Bernardino County covers most of the Inland Empire warehouse belt (Fontana, Ontario, Rialto, San Bernardino) and the High Desert along I-15. The Inland Empire holds roughly a billion square feet of warehouse space (Pitzer College estimate), so local fleets and owner-operators run a high volume of tests. Mobile testers who visit distribution centers and truck yards are common here. ## 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 Ontario? CTC Finder lists 31 testing businesses in Ontario from CARB's public tester list (33 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 Ontario? Yes. 30 listed businesses in Ontario 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 Ontario? 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 - [Upland](https://ctcfinder.com/testers/san-bernardino-county/upland/) — 7 listings, 4 mi - [Montclair](https://ctcfinder.com/testers/san-bernardino-county/montclair/) — 3 listings, 4 mi - [Chino](https://ctcfinder.com/testers/san-bernardino-county/chino/) — 9 listings, 5 mi - [Rancho Cucamonga](https://ctcfinder.com/testers/san-bernardino-county/rancho-cucamonga/) — 18 listings, 6 mi - [Claremont](https://ctcfinder.com/testers/los-angeles-county/claremont/) — 4 listings, 7 mi - [Pomona](https://ctcfinder.com/testers/los-angeles-county/pomona/) — 12 listings, 8 mi - [Eastvale](https://ctcfinder.com/testers/riverside-county/eastvale/) — 8 listings, 9 mi - [Fontana](https://ctcfinder.com/testers/san-bernardino-county/fontana/) — 49 listings, 9 mi - [Norco](https://ctcfinder.com/testers/riverside-county/norco/) — 8 listings, 10 mi - [Jurupa Valley](https://ctcfinder.com/testers/riverside-county/jurupa-valley/) — 18 listings, 10 mi