---
title: "SF Transport Inc. — Clean Truck Check, Winters, CA"
description: "SF Transport Inc. in Winters, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/sf-transport-inc-winters/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# SF Transport Inc.

Clean Truck Check tester in Winters, CA (Yolo County).

> 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.

| Field | Value |
|---|---|
| Location | 736 Foxglove Cir, Winters, CA 95694 |
| County | Yolo County |
| Phone | (530) 750-9320 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks SF Transport Inc. can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is A+ Clean Truck Check in Winters, about 1 mile away. [See listing](https://ctcfinder.com/tester/a-clean-truck-check-winters/).

## Clean Truck Check testers in Yolo County

SF Transport Inc. is one of 42 testing businesses in Yolo County on CARB's public tester list. 36 of them offer mobile testing and 23 do smoke opacity tests. In Winters itself there are 4 listed businesses, 4 of them mobile.

## When your truck is due

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/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does SF Transport Inc. offer mobile Clean Truck Check testing?

Yes. SF Transport Inc. says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can SF Transport Inc. test a 2012 or older diesel truck?

SF Transport Inc. does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [A+ Clean Truck Check](https://ctcfinder.com/tester/a-clean-truck-check-winters/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does SF Transport Inc. charge for a Clean Truck Check?

SF Transport Inc. has not published prices with us; call (530) 750-9320 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is SF Transport Inc. a CARB-credentialed tester?

SF Transport Inc. appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[A+ Clean Truck Check](https://ctcfinder.com/tester/a-clean-truck-check-winters/)** — 1029 Village Cir, Winters, CA 95694 — (530) 378-9111 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Felipe Alarcon](https://ctcfinder.com/tester/felipe-alarcon-winters/)** — Winters, CA 95694 — (530) 908-4658 — 1 mi. Services: mobile testing, OBD testing.
- **[J.T. Martin Trucking](https://ctcfinder.com/tester/j-t-martin-trucking-winters/)** — 4860 Jaybee Ln, Winters, CA 95694 — (530) 400-1202 — 1 mi. Services: mobile testing, OBD testing.
- **[All Sacramento/Bay Area](https://ctcfinder.com/tester/all-sacramento-bay-area-vacaville/)** — Vacaville, CA 95688 — (916) 243-5089 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Brian Tierney](https://ctcfinder.com/tester/brian-tierney-vacaville/)** — Vacaville, CA 95688 — (707) 363-4083 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Buckners Truck Check](https://ctcfinder.com/tester/buckners-truck-check-vacaville/)** — 137 Suncrest Way, Vacaville, CA 95688 — (707) 828-4016 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.