Clean Truck Check testers in Yolo County
42 testing businesses in Yolo County are on CARB's public tester list, in 7 cities. 36 (86%) offer mobile testing, 23 do smoke opacity tests and 27 test motorhomes.
Cities in Yolo
Other cities
Davis
-
Sac Valley Mobile Diesel Testing
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Dunnigan
-
DGT
- Mobile testing
- OBD test
- Motorhomes
Esparto
-
Gerardo Vargas
- Mobile testing
- OBD test
Zamora
-
Perez Bros Diesel Repair
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Frequently asked questions
How many Clean Truck Check testers are in Yolo County?
CTC Finder lists 42 testing businesses in Yolo County from CARB's public tester list (45 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 Yolo County?
Yes. 36 listed businesses in Yolo County 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 Yolo County?
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.
Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.