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

# California CARB Check

Clean Truck Check tester in West 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 | 2329 E Regina St, West Covina, CA 91792 |
| County | Los Angeles County |
| Phone | (626) 736-7797 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks California CARB Check 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 Joseph Avila-Castro in West Covina, about 1 mile away. [See listing](https://ctcfinder.com/tester/joseph-avila-castro-west-covina/).

## Clean Truck Check testers in Los Angeles County

California CARB Check 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. In West Covina itself there are 5 listed businesses, 5 of them mobile.

## 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 California CARB Check offer mobile Clean Truck Check testing?

Yes. California CARB Check 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 California CARB Check test a 2012 or older diesel truck?

California CARB Check does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Joseph Avila-Castro](https://ctcfinder.com/tester/joseph-avila-castro-west-covina/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does California CARB Check charge for a Clean Truck Check?

California CARB Check has not published prices with us; call (626) 736-7797 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 California CARB Check a CARB-credentialed tester?

California CARB Check 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

- **[Joseph Avila-Castro](https://ctcfinder.com/tester/joseph-avila-castro-west-covina/)** — West Covina, CA 91792 — (626) 383-3036 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Joe Chavarin](https://ctcfinder.com/tester/joe-chavarin-la-puente/)** — La Puente, CA 91744 — (323) 854-9781 — 2 mi. Services: mobile testing, OBD testing.
- **[Jose Carrillo](https://ctcfinder.com/tester/jose-carrillo-la-puente/)** — La Puente, CA 91744 — (626) 251-7676 — 2 mi. Services: mobile testing, OBD testing.
- **[Mobile Diesel Smog Check](https://ctcfinder.com/tester/mobile-diesel-smog-check-la-puente/)** — 15911 Hill St, La Puente, CA 91744 — (626) 366-9599 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Rolling Sockets LLC](https://ctcfinder.com/tester/rolling-sockets-llc-la-puente/)** — 226 N Sandalwood Ave, La Puente, CA 91744 — (626) 420-3225 — 2 mi. Services: mobile testing, OBD testing.
- **[The Smog Master](https://ctcfinder.com/tester/the-smog-master-la-puente/)** — 322 N Sunset Ave, La Puente, CA 91744 — (626) 260-8596 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.