--- title: "Clean Truck Check Testers in Merced, CA (13 listed)" description: "Find 13 CARB-credentialed Clean Truck Check testers in Merced, Merced County: 12 offer mobile testing, 6 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/merced-county/merced/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Merced, CA 13 testing businesses in Merced (Merced County) are on CARB's public Clean Truck Check tester list (13 credentialed testers). 12 offer mobile testing, 6 do smoke opacity tests, 7 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 Merced - **[Alden Hansard](https://ctcfinder.com/tester/alden-hansard-merced/)** — Merced, CA 95341 — (209) 777-3842. Services: mobile testing, OBD testing. - **[Best Electric](https://ctcfinder.com/tester/best-electric-merced/)** — 2160 Wardrobe Ave, Merced, CA 95341 — (209) 600-5568. Services: mobile testing, OBD testing. - **[David Biorato](https://ctcfinder.com/tester/david-biorato-merced/)** — Merced, CA 95341 — (350) 204-9765. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Elmer Araujo](https://ctcfinder.com/tester/elmer-araujo-merced/)** — Merced, CA 95348 — (209) 230-3926. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Jnava Mobile Opacity Inspections](https://ctcfinder.com/tester/jnava-mobile-opacity-inspections-merced/)** — 35 W Main St, Merced, CA 95340 — (209) 226-2566. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Lomeli’s Diagnostics](https://ctcfinder.com/tester/lomelis-diagnostics-merced/)** — 3568 Tammy Ct, Merced, CA 95348 — (209) 354-6680. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Luis Nunez Rivas](https://ctcfinder.com/tester/luis-nunez-rivas-merced/)** — Merced, CA 95341 — (510) 965-3973. Services: mobile testing, OBD testing, motorhome testing. - **[MG Truck and Trailer](https://ctcfinder.com/tester/mg-truck-and-trailer-merced/)** — 646 Andrea Dr, Merced, CA 95348 — (209) 752-1084. Services: mobile testing, OBD testing, motorhome testing. - **[Miguel Garcia-Villanueva](https://ctcfinder.com/tester/miguel-garcia-villanueva-merced/)** — Merced, CA 95341 — (209) 355-6459. Services: mobile testing, OBD testing. - **[N&S Tractor Merced](https://ctcfinder.com/tester/n-and-s-tractor-merced-merced/)** — 600 State Rte 59, Merced, CA 95341 — (209) 325-5169. Services: mobile testing, OBD testing, motorhome testing. - **[San Joaquin Mobile Truck Check](https://ctcfinder.com/tester/san-joaquin-mobile-truck-check-merced/)** — 2752 Beachwood Dr, Merced, CA 95348 — (209) 261-3416. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Smith truck repair](https://ctcfinder.com/tester/smith-truck-repair-merced/)** — 15 W 15th St, Merced, CA 95340 — (209) 635-7917. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[VZ2](https://ctcfinder.com/tester/vz2-merced/)** — 3061 Marie Ct, Merced, CA 95340 — (209) 765-8438. Services: mobile testing, OBD testing. ## More testers within 20 miles - **[Rodriguez Smog](https://ctcfinder.com/tester/rodriguez-smog-planada/)** — 9075 State Highway 140, Planada, CA 95365 — (209) 410-8544 — 8 mi. Services: mobile testing, OBD testing. - **[Cen-Cal Truck Check](https://ctcfinder.com/tester/cen-cal-truck-check-atwater/)** — 3292 Mariner Ct, Atwater, CA 95301 — (209) 628-3882 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Israel Vargas](https://ctcfinder.com/tester/israel-vargas-atwater/)** — Atwater, CA 95301 — (209) 321-8975 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Mario Alejandro Garcia Tester](https://ctcfinder.com/tester/mario-alejandro-garcia-tester-atwater/)** — 2385 Redwood Ave, Atwater, CA 95301 — (209) 263-2529 — 10 mi. Services: mobile testing, OBD testing. - **[Monster Equipment](https://ctcfinder.com/tester/monster-equipment-atwater/)** — 554 E Bellevue Rd, Atwater, CA 95301 — (209) 605-8707 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Rafael Orozco](https://ctcfinder.com/tester/rafael-orozco-atwater/)** — Atwater, CA 95301 — (209) 600-9941 — 10 mi. Services: mobile testing, OBD testing. - **[Dan's CTC](https://ctcfinder.com/tester/dans-ctc-winton/)** — 6760 California St, Winton, CA 95388 — (209) 564-1633 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Taylor's](https://ctcfinder.com/tester/taylors-winton/)** — 6171 N Winton Way, Winton, CA 95388 — (209) 261-1048 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Gurpreet Atwal](https://ctcfinder.com/tester/gurpreet-atwal-livingston/)** — Livingston, CA 95334 — (209) 913-9160 — 15 mi. Services: mobile testing, OBD testing. - **[Harpreet Singh Jolly](https://ctcfinder.com/tester/harpreet-singh-jolly-livingston/)** — Livingston, CA 95334 — (559) 999-2732 — 15 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jorge De La Rosa](https://ctcfinder.com/tester/jorge-de-la-rosa-livingston/)** — Livingston, CA 95334 — (209) 850-1232 — 15 mi. Services: mobile testing, OBD testing. - **[Hargreaves Ranches LLC](https://ctcfinder.com/tester/hargreaves-ranches-llc-delhi/)** — 17736 Swanson Rd, Delhi, CA 95315 — (209) 988-7214 — 18 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 Merced? CTC Finder lists 13 testing businesses in Merced from CARB's public tester list (13 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 Merced? Yes. 12 listed businesses in Merced 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 Merced? 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 - [Atwater](https://ctcfinder.com/testers/merced-county/atwater/) — 5 listings, 10 mi - [Livingston](https://ctcfinder.com/testers/merced-county/livingston/) — 3 listings, 15 mi - [Denair](https://ctcfinder.com/testers/stanislaus-county/denair/) — 4 listings, 19 mi - [Dos Palos](https://ctcfinder.com/testers/merced-county/dos-palos/) — 4 listings, 20 mi - [Turlock](https://ctcfinder.com/testers/stanislaus-county/turlock/) — 7 listings, 25 mi - [Los Banos](https://ctcfinder.com/testers/merced-county/los-banos/) — 8 listings, 30 mi - [Ceres](https://ctcfinder.com/testers/stanislaus-county/ceres/) — 7 listings, 31 mi - [Madera](https://ctcfinder.com/testers/madera-county/madera/) — 15 listings, 33 mi - [Oakdale](https://ctcfinder.com/testers/stanislaus-county/oakdale/) — 5 listings, 37 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 37 mi