---
title: "Mobile Testing — Clean Truck Check, Fairfield, CA 94533"
description: "Mobile Testing in Fairfield, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/mobile-testing-fairfield/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mobile Testing

Clean Truck Check tester in Fairfield, 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 | Fairfield, CA 94533 |
| County | Solano County |
| Phone | (916) 538-7777 |
| Website | carbdieseltest.com |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mobile Testing 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Solano County

Mobile Testing 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 Fairfield itself there are 11 listed businesses, 10 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 Mobile Testing offer mobile Clean Truck Check testing?

Yes. Mobile Testing 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 Mobile Testing test a 2012 or older diesel truck?

Yes. Mobile Testing lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does Mobile Testing charge for a Clean Truck Check?

Mobile Testing has not published prices with us; call (916) 538-7777 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 Mobile Testing a CARB-credentialed tester?

Mobile Testing 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

- **[Lucky Tires and Repair Services](https://ctcfinder.com/tester/lucky-tires-and-repair-services-fairfield/)** — 5201 WB Goodman Ln, Fairfield, CA 94533 — (707) 439-5797 — 1 mi. Services: mobile testing, OBD testing.
- **[North Bay Truck Certer](https://ctcfinder.com/tester/north-bay-truck-certer-fairfield/)** — 1245 Illinois St, Fairfield, CA 94533 — (707) 718-8596 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Speed Road service inc](https://ctcfinder.com/tester/speed-road-service-inc-fairfield/)** — 1150 frost place, Fairfield, CA 94533 — (707) 880-0667 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Tommy Bowen](https://ctcfinder.com/tester/tommy-bowen-vacaville/)** — Vacaville, CA 95687 — (707) 330-2331 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Ajmer Shergill](https://ctcfinder.com/tester/ajmer-shergill-fairfield/)** — Fairfield, CA 94534 — (707) 227-6194 — 7 mi. Services: mobile testing, OBD testing.
- **[California CTC Mobile Testing](https://ctcfinder.com/tester/california-ctc-mobile-testing-fairfield/)** — 5328 Venus Dr, Fairfield, CA 94534 — (707) 761-4000 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.