--- title: "Clean Truck Check Testers in Nevada City, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in Nevada City, Nevada County: 1 offer mobile testing, 3 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/nevada-county/nevada-city/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Nevada City, CA 3 testing businesses in Nevada City (Nevada County) are on CARB's public Clean Truck Check tester list (4 credentialed testers). 1 offer mobile testing, 3 do smoke opacity tests, 3 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 Nevada City - **[Robinson Enterprises](https://ctcfinder.com/tester/robinson-enterprises-nevada-city/)** — 293 Lower Grass Valley Rd, Nevada City, CA 95959 — (530) 559-7335. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Brian Forkner](https://ctcfinder.com/tester/brian-forkner-nevada-city/)** — Nevada City, CA 95959 — (530) 470-3881. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Sierra Diesel Mobile Smog](https://ctcfinder.com/tester/sierra-diesel-mobile-smog-nevada-city/)** — 16396 Jacks Rd, Nevada City, CA 95959 — (530) 920-0092. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[Mobile Truck Service](https://ctcfinder.com/tester/mobile-truck-service-alta/)** — 565 Kearsarge Ct, Alta, CA 95701 — (916) 389-0312 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Cody's Clean Truck Check](https://ctcfinder.com/tester/codys-clean-truck-check-grass-valley/)** — 780 Whispering Pines Ln, Grass Valley, CA 95945 — (530) 277-5833 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Palmer Enterprises Truck & Auto Repair LLC](https://ctcfinder.com/tester/palmer-enterprises-truck-and-auto-repair-llc-grass-valley/)** — 11352 E Bennett Rd, Grass Valley, CA 95945 — (530) 272-3439 — 12 mi. Services: OBD testing. - **[JTS truck and equipment repair inc](https://ctcfinder.com/tester/jts-truck-and-equipment-repair-inc-rough-and-ready/)** — 17268 Cattle Dr, Rough and Ready, CA 95975 — (530) 615-1219 — 18 mi. Services: mobile testing, OBD testing, motorhome testing. - **[North State Mobile Solutions](https://ctcfinder.com/tester/north-state-mobile-solutions-colfax/)** — 1 N Main St, Colfax, CA 95713 — (916) 345-4847 — 19 mi. Services: mobile testing, OBD testing, motorhome testing. - **[NorthState Mobile Smoke Testing](https://ctcfinder.com/tester/northstate-mobile-smoke-testing-colfax/)** — 1125 Dallimore Rd, Colfax, CA 95713 — (916) 628-9061 — 19 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Quentin Turek](https://ctcfinder.com/tester/quentin-turek-colfax/)** — Colfax, CA 95713 — (916) 472-4130 — 19 mi. Services: mobile testing, OBD testing, smoke opacity (non-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 Nevada City? CTC Finder lists 3 testing businesses in Nevada City from CARB's public tester list (4 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 Nevada City? Yes. 1 listed business in Nevada 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 Nevada 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 - [Colfax](https://ctcfinder.com/testers/placer-county/colfax/) — 3 listings, 19 mi - [Auburn](https://ctcfinder.com/testers/placer-county/auburn/) — 7 listings, 30 mi - [Marysville](https://ctcfinder.com/testers/yuba-county/marysville/) — 3 listings, 34 mi - [Oroville](https://ctcfinder.com/testers/butte-county/oroville/) — 4 listings, 36 mi - [Lincoln](https://ctcfinder.com/testers/placer-county/lincoln/) — 4 listings, 38 mi