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

# Mobile HD services

Clean Truck Check tester in Tomales, CA (Marin 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 | 25300 Highway 1, Tomales, CA 94971 |
| County | Marin County |
| Phone | (707) 326-6965 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mobile HD services 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 | Not listed |

## Clean Truck Check testers in Marin County

Mobile HD services is one of 4 testing businesses in Marin County on CARB's public tester list. 3 of them offer mobile testing and 1 do smoke opacity tests.

## 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 HD services offer mobile Clean Truck Check testing?

Yes. Mobile HD services 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 HD services test a 2012 or older diesel truck?

Yes. Mobile HD services 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 HD services charge for a Clean Truck Check?

Mobile HD services has not published prices with us; call (707) 326-6965 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 HD services a CARB-credentialed tester?

Mobile HD services 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

- **[Dylan Enochs](https://ctcfinder.com/tester/dylan-enochs-sebastopol/)** — Sebastopol, CA 95472 — (707) 322-5475 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Alpha Fleet Solutions LLC](https://ctcfinder.com/tester/alpha-fleet-solutions-llc-cotati/)** — 141 Helman Ln, Cotati, CA 94931 — (707) 971-0514 — 12 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[CalFleet](https://ctcfinder.com/tester/calfleet-cotati/)** — 7911 Redwood Dr Suite 131, Cotati, CA 94931 — (707) 665-5710 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Chris Patterson](https://ctcfinder.com/tester/chris-patterson-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 292-6644 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Donahue Truck Centers](https://ctcfinder.com/tester/donahue-truck-centers-santa-rosa/)** — 520 E Todd Rd, Santa Rosa, CA 95407 — (707) 975-5080 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Juan Torres](https://ctcfinder.com/tester/juan-torres-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 321-1951 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.