---
title: "Smog Brothers — Clean Truck Check, Fallbrook, CA"
description: "Smog Brothers in Fallbrook, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/smog-brothers-fallbrook/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Smog Brothers

Clean Truck Check tester in Fallbrook, CA (San Diego 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 | 119 W College St, Fallbrook, CA 92028 |
| County | San Diego County |
| Phone | (760) 828-1256 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Smog Brothers 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in San Diego County

Smog Brothers is one of 178 testing businesses in San Diego County on CARB's public tester list. 157 of them offer mobile testing and 91 do smoke opacity tests. In Fallbrook 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 Smog Brothers offer mobile Clean Truck Check testing?

Yes. Smog Brothers 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 Smog Brothers test a 2012 or older diesel truck?

Yes. Smog Brothers lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

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

Smog Brothers has not published prices with us; call (760) 828-1256 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 Smog Brothers a CARB-credentialed tester?

Smog Brothers 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

- **[Am Auto Smog](https://ctcfinder.com/tester/am-auto-smog-fallbrook/)** — 4292 Rosa Rancho Ln, Fallbrook, CA 92028 — (760) 586-5023 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cristian Francisco](https://ctcfinder.com/tester/cristian-francisco-fallbrook/)** — Fallbrook, CA 92028 — (760) 583-9230 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[L5 Mobile Tech LLC](https://ctcfinder.com/tester/l5-mobile-tech-llc-fallbrook/)** — 1133 E Mission Rd, Fallbrook, CA 92028 — (760) 626-8534 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Mission Automotive](https://ctcfinder.com/tester/mission-automotive-fallbrook/)** — 1557 South Mission Road, Fallbrook, CA 92028 — (760) 586-8265 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Truck Check Opacity/OBD](https://ctcfinder.com/tester/clean-truck-check-opacity-obd-temecula/)** — 42122 Rio Nedo Rd, Temecula, CA 92590 — (619) 971-9117 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Murrieta development company](https://ctcfinder.com/tester/murrieta-development-company-temecula/)** — 42540 Rio Nedo, Temecula, CA 92590 — (951) 386-9514 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.