---
title: "Matthew Morrison — Clean Truck Check, Laytonville, CA"
description: "Matthew Morrison in Laytonville, 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/matthew-morrison-laytonville/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Matthew Morrison

Clean Truck Check tester in Laytonville, CA (Mendocino 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 | Laytonville, CA 95454 |
| County | Mendocino County |
| Phone | (707) 472-8500 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Matthew Morrison 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 Mendocino County

Matthew Morrison is one of 8 testing businesses in Mendocino County on CARB's public tester list. 8 of them offer mobile testing and 4 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 Matthew Morrison offer mobile Clean Truck Check testing?

Yes. Matthew Morrison 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 Matthew Morrison test a 2012 or older diesel truck?

Yes. Matthew Morrison 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 Matthew Morrison charge for a Clean Truck Check?

Matthew Morrison has not published prices with us; call (707) 472-8500 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 Matthew Morrison a CARB-credentialed tester?

Matthew Morrison 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

- **[Essential Fleet services LLC](https://ctcfinder.com/tester/essential-fleet-services-llc-willits/)** — 1435 Baechtel Rd, Willits, CA 95490 — (919) 760-0709 — 22 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Spackman CTC Mobile Mechanic Services](https://ctcfinder.com/tester/spackman-ctc-mobile-mechanic-services-willits/)** — 27481 Coyote Pl, Willits, CA 95490 — (707) 391-4675 — 22 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.