---
title: "Redwood Towing Service & Repair — Clean Truck Check, Redway, CA"
description: "Redwood Towing Service & Repair in Redway, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/redwood-towing-service-and-repair-redway/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Redwood Towing Service & Repair

Clean Truck Check tester in Redway, CA (Humboldt 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 | 101 Murrish Rd, Redway, CA 95560 |
| County | Humboldt County |
| Phone | (707) 223-0027 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Redwood Towing Service & Repair 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 |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Matthew Morrison in Laytonville, about 31 miles away. [See listing](https://ctcfinder.com/tester/matthew-morrison-laytonville/).

## Clean Truck Check testers in Humboldt County

Redwood Towing Service & Repair is one of 20 testing businesses in Humboldt County on CARB's public tester list. 16 of them offer mobile testing and 13 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 Redwood Towing Service & Repair offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Matthew Morrison](https://ctcfinder.com/tester/matthew-morrison-laytonville/) (about 31 miles).

### Can Redwood Towing Service & Repair test a 2012 or older diesel truck?

Yes. Redwood Towing Service & Repair 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 Redwood Towing Service & Repair charge for a Clean Truck Check?

Redwood Towing Service & Repair has not published prices with us; call (707) 223-0027 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 Redwood Towing Service & Repair a CARB-credentialed tester?

Redwood Towing Service & Repair 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.