---
title: "Wright Knox Motor Lines, Inc. — Clean Truck Check, Armagh, PA"
description: "Wright Knox Motor Lines, Inc. in Armagh, PA is on CARB's Clean Truck Check tester list. Offers OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/wright-knox-motor-lines-inc-armagh-pa/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Wright Knox Motor Lines, Inc.

Clean Truck Check tester in Armagh, PA.

> 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 | 652 E Philadelphia Street Ext, Armagh, PA 15920 |
| Phone | (814) 446-5611 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Wright Knox Motor Lines, Inc. 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 |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Airlimits - Pittsburgh in Pittsburgh, about 48 miles away. [See listing](https://ctcfinder.com/tester/airlimits-pittsburgh-pittsburgh-pa/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is LJ Morgan Transportation in Blairsville, about 10 miles away. [See listing](https://ctcfinder.com/tester/lj-morgan-transportation-blairsville-pa/).

## Clean Truck Check testers in Pennsylvania

Wright Knox Motor Lines, Inc. is one of 16 testing businesses in Pennsylvania on CARB's public tester list. 10 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 Wright Knox Motor Lines, Inc. 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 [LJ Morgan Transportation](https://ctcfinder.com/tester/lj-morgan-transportation-blairsville-pa/) (about 10 miles).

### Can Wright Knox Motor Lines, Inc. test a 2012 or older diesel truck?

Wright Knox Motor Lines, Inc. does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Airlimits - Pittsburgh](https://ctcfinder.com/tester/airlimits-pittsburgh-pittsburgh-pa/) (about 48 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Wright Knox Motor Lines, Inc. charge for a Clean Truck Check?

Wright Knox Motor Lines, Inc. has not published prices with us; call (814) 446-5611 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 Wright Knox Motor Lines, Inc. a CARB-credentialed tester?

Wright Knox Motor Lines, Inc. 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

- **[LJ Morgan Transportation](https://ctcfinder.com/tester/lj-morgan-transportation-blairsville-pa/)** — Blairsville, PA 15717 — (724) 840-2167 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.