---
title: "C-los Mobile CARB Check — Clean Truck Check, Los Angeles, CA"
description: "C-los Mobile CARB Check in Los Angeles, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address…"
url: "https://ctcfinder.com/tester/c-los-mobile-carb-check-los-angeles/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# C-los Mobile CARB Check

Clean Truck Check tester in Los Angeles, 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 | 620 East Redfield Avenue, Los Angeles, CA 90042 |
| County | Los Angeles County |
| Phone | (552) 774-6755 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks C-los Mobile 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 | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is John Daugherty in Los Angeles, about 3 miles away. [See listing](https://ctcfinder.com/tester/john-daugherty-los-angeles/).

## Clean Truck Check testers in Los Angeles County

C-los Mobile 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 Los Angeles itself there are 69 listed businesses, 60 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 C-los Mobile CARB Check offer mobile Clean Truck Check testing?

Yes. C-los Mobile 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 C-los Mobile CARB Check test a 2012 or older diesel truck?

C-los Mobile CARB Check does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [John Daugherty](https://ctcfinder.com/tester/john-daugherty-los-angeles/) (about 3 miles). Trucks from 2013 on get an OBD scan instead.

### How much does C-los Mobile CARB Check charge for a Clean Truck Check?

C-los Mobile CARB Check has not published prices with us; call (552) 774-6755 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 C-los Mobile CARB Check a CARB-credentialed tester?

C-los Mobile 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

- **[AD Smog Check](https://ctcfinder.com/tester/ad-smog-check-los-angeles/)** — 3900 North Figueroa Street, Los Angeles, CA 90065 — (323) 337-5135 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Chris Chappel](https://ctcfinder.com/tester/chris-chappel-los-angeles/)** — Los Angeles, CA 90032 — (619) 405-9758 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Jeff's Automobile Repair Service](https://ctcfinder.com/tester/jeffs-automobile-repair-service-los-angeles/)** — 5196 Alhambra Ave, Los Angeles, CA 90032 — (626) 278-0787 — 3 mi. Services: OBD testing, motorhome testing.
- **[John Daugherty](https://ctcfinder.com/tester/john-daugherty-los-angeles/)** — Los Angeles, CA 90032 — (626) 756-0196 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[CTC Mobile Tester](https://ctcfinder.com/tester/ctc-mobile-tester-alhambra/)** — 1325 Elm St, Alhambra, CA 91803 — (626) 313-6409 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Robert Araujo](https://ctcfinder.com/tester/robert-araujo-alhambra/)** — Alhambra, CA 91803 — (323) 271-2565 — 4 mi. Services: mobile testing.