---
title: "Vallejo Smog Dog — Clean Truck Check, Vallejo, CA"
description: "Vallejo Smog Dog in Vallejo, 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/vallejo-smog-dog-vallejo/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Vallejo Smog Dog

Clean Truck Check tester in Vallejo, CA (Solano 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 | 1921 Sonoma Blvd, Vallejo, CA 94590 |
| County | Solano County |
| Phone | (707) 557-7664 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Vallejo Smog Dog 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 David Hartfield III in Vallejo, about 4 miles away. [See listing](https://ctcfinder.com/tester/david-hartfield-iii-vallejo/).

## Clean Truck Check testers in Solano County

Vallejo Smog Dog is one of 38 testing businesses in Solano County on CARB's public tester list. 34 of them offer mobile testing and 21 do smoke opacity tests. In Vallejo itself there are 8 listed businesses, 7 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 Vallejo Smog Dog offer mobile Clean Truck Check testing?

Yes. Vallejo Smog Dog 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 Vallejo Smog Dog test a 2012 or older diesel truck?

Vallejo Smog Dog does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [David Hartfield III](https://ctcfinder.com/tester/david-hartfield-iii-vallejo/) (about 4 miles). Trucks from 2013 on get an OBD scan instead.

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

Vallejo Smog Dog has not published prices with us; call (707) 557-7664 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 Vallejo Smog Dog a CARB-credentialed tester?

Vallejo Smog Dog 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

- **[Days Smog& DMV Registration Services](https://ctcfinder.com/tester/days-smog-and-dmv-registration-services-vallejo/)** — 1624 Broadway St, Vallejo, CA 94590 — (707) 997-0420 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Touch Trucking LLC](https://ctcfinder.com/tester/touch-trucking-llc-vallejo/)** — 301 Greenfield Ave, Vallejo, CA 94590 — (510) 496-1005 — 1 mi. Services: mobile testing, OBD testing.
- **[ECS Mobile Services](https://ctcfinder.com/tester/ecs-mobile-services-vallejo/)** — 179 Coloma Way, Vallejo, CA 94589 — (707) 398-8574 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Michael's Transportation Service Inc.](https://ctcfinder.com/tester/michaels-transportation-service-inc-vallejo/)** — 140 Yolano Dr, Vallejo, CA 94589 — (707) 712-6713 — 3 mi. Services: not listed.
- **[David Hartfield III](https://ctcfinder.com/tester/david-hartfield-iii-vallejo/)** — Vallejo, CA 94591 — (510) 707-3344 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DDK Enterprises INC](https://ctcfinder.com/tester/ddk-enterprises-inc-vallejo/)** — 8012 Vertine Ct, Vallejo, CA 94591 — (510) 563-7016 — 4 mi. Services: mobile testing, OBD testing.