---
title: "The Smog Master — Clean Truck Check, La Puente, CA"
description: "The Smog Master in La Puente, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/the-smog-master-la-puente/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# The Smog Master

Clean Truck Check tester in La Puente, 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 | 322 N Sunset Ave, La Puente, CA 91744 |
| County | Los Angeles County |
| Phone | (626) 260-8596 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks The Smog Master 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 Mobile Diesel Smog Check in La Puente, about 1 mile away. [See listing](https://ctcfinder.com/tester/mobile-diesel-smog-check-la-puente/).

## Clean Truck Check testers in Los Angeles County

The Smog Master 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 La Puente itself there are 6 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 The Smog Master offer mobile Clean Truck Check testing?

Yes. The Smog Master 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 The Smog Master test a 2012 or older diesel truck?

The Smog Master does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Mobile Diesel Smog Check](https://ctcfinder.com/tester/mobile-diesel-smog-check-la-puente/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does The Smog Master charge for a Clean Truck Check?

The Smog Master has not published prices with us; call (626) 260-8596 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 The Smog Master a CARB-credentialed tester?

The Smog Master 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

- **[Joe Chavarin](https://ctcfinder.com/tester/joe-chavarin-la-puente/)** — La Puente, CA 91744 — (323) 854-9781 — 1 mi. Services: mobile testing, OBD testing.
- **[Jose Carrillo](https://ctcfinder.com/tester/jose-carrillo-la-puente/)** — La Puente, CA 91744 — (626) 251-7676 — 1 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 — 1 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 — 1 mi. Services: mobile testing, OBD testing.
- **[California CARB Check](https://ctcfinder.com/tester/california-carb-check-west-covina/)** — 2329 E Regina St, West Covina, CA 91792 — (626) 736-7797 — 2 mi. Services: mobile testing, OBD testing.
- **[Joseph Avila-Castro](https://ctcfinder.com/tester/joseph-avila-castro-west-covina/)** — West Covina, CA 91792 — (626) 383-3036 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.