--- title: "Clean Truck Check Testers in Colfax, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in Colfax, Placer County: 3 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/placer-county/colfax/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Colfax, CA 3 testing businesses in Colfax (Placer County) are on CARB's public Clean Truck Check tester list (3 credentialed testers). 3 offer mobile testing, 1 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 Colfax - **[North State Mobile Solutions](https://ctcfinder.com/tester/north-state-mobile-solutions-colfax/)** — 1 N Main St, Colfax, CA 95713 — (916) 345-4847. 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. Services: mobile testing, OBD testing, motorhome testing. - **[Quentin Turek](https://ctcfinder.com/tester/quentin-turek-colfax/)** — Colfax, CA 95713 — (916) 472-4130. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[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 — 8 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 — 8 mi. Services: OBD testing. - **[Williams Heavy Equipment](https://ctcfinder.com/tester/williams-heavy-equipment-auburn/)** — 10556 Combie Rd #6437, Auburn, CA 95949 — (530) 913-6597 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Allen l Chitty](https://ctcfinder.com/tester/allen-l-chitty-auburn/)** — Auburn, CA 95602 — (916) 225-0454 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Truck & RV TESTING](https://ctcfinder.com/tester/truck-and-rv-testing-auburn/)** — Auburn, CA 95602 — (916) 538-7777 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Truck Service](https://ctcfinder.com/tester/mobile-truck-service-alta/)** — 565 Kearsarge Ct, Alta, CA 95701 — (916) 389-0312 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[EZE Testing Services](https://ctcfinder.com/tester/eze-testing-services-cool/)** — 4209 Cherry Acres Cir, Cool, CA 95614 — (530) 350-0467 — 14 mi. Services: mobile testing, OBD testing, motorhome testing. - **[CAP City Diesel Inspections](https://ctcfinder.com/tester/cap-city-diesel-inspections-auburn/)** — 2945 Bell Rd, Auburn, CA 95603 — (916) 538-7777 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[CARB Compliant Mobile Testing](https://ctcfinder.com/tester/carb-compliant-mobile-testing-auburn/)** — 11590 Stonebrook Dr, Auburn, CA 95603 — (916) 572-4917 — 14 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Juan Renderos](https://ctcfinder.com/tester/juan-renderos-auburn/)** — Auburn, CA 95603 — (949) 547-2585 — 14 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Lightfoot Mobile Truck Emissions](https://ctcfinder.com/tester/lightfoot-mobile-truck-emissions-auburn/)** — 12345 Hyde Park Ln, Auburn, CA 95603 — (916) 849-0426 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome 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 — 15 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 Colfax? CTC Finder lists 3 testing businesses in Colfax from CARB's public tester list (3 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 Colfax? Yes. 3 listed businesses in Colfax 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 Colfax? 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 - [Auburn](https://ctcfinder.com/testers/placer-county/auburn/) — 7 listings, 12 mi - [Nevada City](https://ctcfinder.com/testers/nevada-county/nevada-city/) — 3 listings, 19 mi - [Lincoln](https://ctcfinder.com/testers/placer-county/lincoln/) — 4 listings, 23 mi - [Placerville](https://ctcfinder.com/testers/el-dorado-county/placerville/) — 3 listings, 25 mi - [Rocklin](https://ctcfinder.com/testers/placer-county/rocklin/) — 6 listings, 26 mi - [Roseville](https://ctcfinder.com/testers/placer-county/roseville/) — 12 listings, 30 mi - [Folsom](https://ctcfinder.com/testers/sacramento-county/folsom/) — 5 listings, 31 mi - [Marysville](https://ctcfinder.com/testers/yuba-county/marysville/) — 3 listings, 32 mi - [Citrus Heights](https://ctcfinder.com/testers/sacramento-county/citrus-heights/) — 7 listings, 33 mi - [Shingle Springs](https://ctcfinder.com/testers/el-dorado-county/shingle-springs/) — 3 listings, 33 mi