---
title: "J.J.'s Smog — Clean Truck Check, Oxnard, CA | CTC Finder"
description: "J.J.'s Smog in Oxnard, CA is on CARB's Clean Truck Check tester list with 2 credentialed testers. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/j-j-s-smog-oxnard/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# J.J.'s Smog

Clean Truck Check tester in Oxnard, CA (Ventura 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 | 1281 S Oxnard Blvd, Oxnard, CA 93030 |
| County | Ventura County |
| Phone | (805) 216-5284 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 2 |
| Last verified | 2026-11-01 |

## Which trucks J.J.'s Smog 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 Ventura County

J.J.'s Smog is one of 68 testing businesses in Ventura County on CARB's public tester list. 61 of them offer mobile testing and 21 do smoke opacity tests. In Oxnard itself there are 22 listed businesses, 19 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 J.J.'s Smog offer mobile Clean Truck Check testing?

Yes. J.J.'s Smog 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 J.J.'s Smog test a 2012 or older diesel truck?

Yes. J.J.'s Smog 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 J.J.'s Smog charge for a Clean Truck Check?

J.J.'s Smog has not published prices with us; call (805) 216-5284 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 J.J.'s Smog a CARB-credentialed tester?

J.J.'s Smog appears on CARB's public Clean Truck Check tester list with 2 credentialed testers, 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

- **[Big Rig Smog II](https://ctcfinder.com/tester/big-rig-smog-ii-oxnard/)** — 202 S Oxnard Blvd, Oxnard, CA 93030 — (805) 638-3911 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Certified CTC Testing](https://ctcfinder.com/tester/certified-ctc-testing-oxnard/)** — 3451 Jupiter Ct, Oxnard, CA 93030 — (805) 624-0770 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Ivan Juarez](https://ctcfinder.com/tester/ivan-juarez-oxnard/)** — Oxnard, CA 93030 — (805) 946-8357 — 1 mi. Services: mobile testing, OBD testing.
- **[Juarez Clean Truck Check](https://ctcfinder.com/tester/juarez-clean-truck-check-oxnard/)** — 950 Mountain View Ave, Oxnard, CA 93030 — (805) 910-7116 — 1 mi. Services: mobile testing, OBD testing.
- **[Marvin E Lopez](https://ctcfinder.com/tester/marvin-e-lopez-oxnard/)** — Oxnard, CA 93030 — (805) 236-6036 — 1 mi. Services: mobile testing, OBD testing.
- **[Mobile Opacity Testing](https://ctcfinder.com/tester/mobile-opacity-testing-oxnard/)** — 512 Niveo Lane 512 Niveo Lane, Oxnard, CA 93030 — (805) 612-5243 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.