---
title: "Landis Farr — Clean Truck Check, Covina, CA | CTC Finder"
description: "Landis Farr in Covina, CA is on CARB's Clean Truck Check tester list. Offers mobile testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/landis-farr-covina/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Landis Farr

Clean Truck Check tester in Covina, CA (Los Angeles 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 | Covina, CA 91722 |
| County | Los Angeles County |
| Phone | (213) 706-8641 |
| Mobile testing | Yes |
| OBD testing | No |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Landis Farr can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Not listed |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Not listed |
| 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 Fleet Cert in West Covina, about 3 miles away. [See listing](https://ctcfinder.com/tester/fleet-cert-west-covina/).

## Clean Truck Check testers in Los Angeles County

Landis Farr is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 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 Landis Farr offer mobile Clean Truck Check testing?

Yes. Landis Farr 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 Landis Farr test a 2012 or older diesel truck?

Landis Farr does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Fleet Cert](https://ctcfinder.com/tester/fleet-cert-west-covina/) (about 3 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Landis Farr charge for a Clean Truck Check?

Landis Farr has not published prices with us; call (213) 706-8641 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 Landis Farr a CARB-credentialed tester?

Landis Farr 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

- **[Fleet Cert](https://ctcfinder.com/tester/fleet-cert-west-covina/)** — 521 South Lark Ellen Avenue, West Covina, CA 91791 — (626) 610-8533 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Accurate Testing Service](https://ctcfinder.com/tester/accurate-testing-service-west-covina/)** — 1004 W West Covina Pkwy, West Covina, CA 91790 — (626) 710-8236 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Skyfleet](https://ctcfinder.com/tester/skyfleet-west-covina/)** — 1520 West Cameron Avenue, West Covina, CA 91790 — (626) 290-7739 — 3 mi. Services: mobile testing.
- **[Rene Quinones](https://ctcfinder.com/tester/rene-quinones-covina/)** — Covina, CA 91724 — (909) 542-5155 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[188844motor.com](https://ctcfinder.com/tester/188844motor-com-glendora/)** — 512 W Route 66, Glendora, CA 91740 — (951) 258-7309 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Darling Smog](https://ctcfinder.com/tester/darling-smog-glendora/)** — 743 W Route 66 #4, Glendora, CA 91740 — (626) 495-8835 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.