---
title: "Yolo Smog — Clean Truck Check, Woodland, CA | CTC Finder"
description: "Yolo Smog in Woodland, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/yolo-smog-woodland/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Yolo Smog

Clean Truck Check tester in Woodland, 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 | 374 W Main St, Woodland, CA 95695 |
| County | Yolo County |
| Phone | (530) 383-9330 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Yolo Smog 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 Paul Mendoza in Woodland, about 1 mile away. [See listing](https://ctcfinder.com/tester/paul-mendoza-woodland/).

## Clean Truck Check testers in Yolo County

Yolo Smog 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 Woodland itself there are 12 listed businesses, 11 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 Yolo Smog offer mobile Clean Truck Check testing?

Yes. Yolo Smog 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 Yolo Smog test a 2012 or older diesel truck?

Yolo Smog does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Paul Mendoza](https://ctcfinder.com/tester/paul-mendoza-woodland/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Yolo Smog charge for a Clean Truck Check?

Yolo Smog has not published prices with us; call (530) 383-9330 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 Yolo Smog a CARB-credentialed tester?

Yolo Smog 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

- **[Paul Mendoza](https://ctcfinder.com/tester/paul-mendoza-woodland/)** — Woodland, CA 95695 — (530) 514-5441 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Vadim Yev CAPITAL CITY DIESEL INSPECTIONS](https://ctcfinder.com/tester/vadim-yev-capital-city-diesel-inspections-woodland/)** — 10 West Main St, Woodland, CA 95695 — (916) 538-7777 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Best Smog](https://ctcfinder.com/tester/best-smog-woodland/)** — 315 East St, Woodland, CA 95776 — (530) 312-7780 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[BusWest](https://ctcfinder.com/tester/buswest-woodland/)** — 210 N East St, Woodland, CA 95776 — (530) 702-9339 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Capital City Diesel Inspection](https://ctcfinder.com/tester/capital-city-diesel-inspection-woodland/)** — 1296 E Gibson Rd, Woodland, CA 95776 — (916) 538-7777 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carlos Salas](https://ctcfinder.com/tester/carlos-salas-woodland/)** — Woodland, CA 95776 — (530) 537-6759 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.