---
title: "Wyrefree COM LLC — Clean Truck Check, Knoxville, TN"
description: "Wyrefree COM LLC in Knoxville, TN is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/wyrefree-com-llc-knoxville-tn/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Wyrefree COM LLC

Clean Truck Check tester in Knoxville, TN.

> 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 | 9234 Kingston Pike, Knoxville, TN 37922 |
| Phone | (610) 570-9655 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Wyrefree COM 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 | Not listed |

## Clean Truck Check testers in Tennessee

Wyrefree COM LLC is one of 10 testing businesses in Tennessee 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 Wyrefree COM LLC offer mobile Clean Truck Check testing?

Yes. Wyrefree COM 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 Wyrefree COM LLC test a 2012 or older diesel truck?

Wyrefree COM LLC does not list smoke opacity testing, which older non-OBD diesel trucks need. Trucks from 2013 on get an OBD scan instead.

### How much does Wyrefree COM LLC charge for a Clean Truck Check?

Wyrefree COM LLC has not published prices with us; call (610) 570-9655 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 Wyrefree COM LLC a CARB-credentialed tester?

Wyrefree COM 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

- **[East TN Carb Testers](https://ctcfinder.com/tester/east-tn-carb-testers-knoxville-tn/)** — 9984 Martha Knight Cir, Knoxville, TN 37932 — (865) 203-4060 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Green Valley Transportation](https://ctcfinder.com/tester/green-valley-transportation-knoxville-tn/)** — 608 Simmons Rd, Knoxville, TN 37932 — (623) 986-5551 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.