---
title: "DeFrancesco Diesel Smog — Clean Truck Check, Jurupa Valley, CA"
description: "DeFrancesco Diesel Smog in Jurupa Valley, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/defrancesco-diesel-smog-jurupa-valley/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# DeFrancesco Diesel Smog

Clean Truck Check tester in Jurupa Valley, CA (Riverside 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 | 5847 Ocasa Dr, Jurupa Valley, CA 91752 |
| County | Riverside County |
| Phone | (909) 697-9154 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks DeFrancesco Diesel 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 Riverside County

DeFrancesco Diesel Smog is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 do smoke opacity tests. In Jurupa Valley itself there are 18 listed businesses, 17 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 DeFrancesco Diesel Smog offer mobile Clean Truck Check testing?

Yes. DeFrancesco Diesel 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 DeFrancesco Diesel Smog test a 2012 or older diesel truck?

Yes. DeFrancesco Diesel 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 DeFrancesco Diesel Smog charge for a Clean Truck Check?

DeFrancesco Diesel Smog has not published prices with us; call (909) 697-9154 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 DeFrancesco Diesel Smog a CARB-credentialed tester?

DeFrancesco Diesel Smog 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

- **[Anthony Przybylek](https://ctcfinder.com/tester/anthony-przybylek-jurupa-valley/)** — Jurupa Valley, CA 91752 — (951) 434-9857 — 1 mi. Services: mobile testing.
- **[D&S Automotive](https://ctcfinder.com/tester/d-and-s-automotive-jurupa-valley/)** — 10585 Limonite Ave, Jurupa Valley, CA 91752 — (951) 703-8926 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Diandre Grant](https://ctcfinder.com/tester/diandre-grant-mira-loma/)** — Mira Loma, CA 91752 — (562) 303-4355 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Brandon Hitchcock](https://ctcfinder.com/tester/brandon-hitchcock-ontario/)** — Ontario, CA 91761 — (562) 367-9638 — 4 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[California Diesel Complaince](https://ctcfinder.com/tester/california-diesel-complaince-ontario/)** — 1609 S Grove Av #110, Ontario, CA 91761 — (909) 923-8622 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cctv INC](https://ctcfinder.com/tester/cctv-inc-ontario/)** — 2025 S Milliken Ave, Ontario, CA 91761 — (626) 670-0779 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.