---
title: "Essential Fleet services LLC — Clean Truck Check, Willits, CA"
description: "Essential Fleet services LLC in Willits, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address…"
url: "https://ctcfinder.com/tester/essential-fleet-services-llc-willits/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Essential Fleet services LLC

Clean Truck Check tester in Willits, 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 | 1435 Baechtel Rd, Willits, CA 95490 |
| County | Mendocino County |
| Phone | (919) 760-0709 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Essential Fleet services LLC 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 Spackman CTC Mobile Mechanic Services in Willits, about 1 mile away. [See listing](https://ctcfinder.com/tester/spackman-ctc-mobile-mechanic-services-willits/).

## Clean Truck Check testers in Mendocino County

Essential Fleet services LLC 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 Essential Fleet services LLC offer mobile Clean Truck Check testing?

Yes. Essential Fleet services LLC 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 Essential Fleet services LLC test a 2012 or older diesel truck?

Essential Fleet services LLC does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Spackman CTC Mobile Mechanic Services](https://ctcfinder.com/tester/spackman-ctc-mobile-mechanic-services-willits/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Essential Fleet services LLC charge for a Clean Truck Check?

Essential Fleet services LLC has not published prices with us; call (919) 760-0709 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 Essential Fleet services LLC a CARB-credentialed tester?

Essential Fleet services LLC 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

- **[Spackman CTC Mobile Mechanic Services](https://ctcfinder.com/tester/spackman-ctc-mobile-mechanic-services-willits/)** — 27481 Coyote Pl, Willits, CA 95490 — (707) 391-4675 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Fort Bragg Diesel](https://ctcfinder.com/tester/fort-bragg-diesel-fort-bragg/)** — 1230 N Main St, Fort Bragg, CA 95437 — (707) 813-4532 — 18 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Matthew Morrison](https://ctcfinder.com/tester/matthew-morrison-laytonville/)** — Laytonville, CA 95454 — (707) 472-8500 — 22 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Independent Bookkeeper](https://ctcfinder.com/tester/independent-bookkeeper-ukiah/)** — Ukiah, CA 95482 — (707) 367-2699 — 24 mi. Services: mobile testing, OBD testing.
- **[Peterson Cat](https://ctcfinder.com/tester/peterson-cat-ukiah/)** — Ukiah, CA 95482 — (707) 367-8242 — 24 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.