---
title: "Petersen Smog & Automotive — Clean Truck Check, Ripon, CA"
description: "Petersen Smog & Automotive in Ripon, 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/petersen-smog-and-automotive-ripon/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Petersen Smog & Automotive

Clean Truck Check tester in Ripon, CA (San Joaquin 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 | 106 2nd St, Ripon, CA 95366 |
| County | San Joaquin County |
| Phone | (209) 505-3484 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Petersen Smog & Automotive 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 Joaquin County

Petersen Smog & Automotive is one of 124 testing businesses in San Joaquin County on CARB's public tester list. 111 of them offer mobile testing and 53 do smoke opacity tests. In Ripon itself there are 3 listed businesses, 3 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 Petersen Smog & Automotive offer mobile Clean Truck Check testing?

Yes. Petersen Smog & Automotive 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 Petersen Smog & Automotive test a 2012 or older diesel truck?

Yes. Petersen Smog & Automotive 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 Petersen Smog & Automotive charge for a Clean Truck Check?

Petersen Smog & Automotive has not published prices with us; call (209) 505-3484 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 Petersen Smog & Automotive a CARB-credentialed tester?

Petersen Smog & Automotive 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

- **[A2z Solutions INC](https://ctcfinder.com/tester/a2z-solutions-inc-ripon/)** — Ripon, CA 95366 — (209) 707-9021 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Ripon Smog](https://ctcfinder.com/tester/ripon-smog-ripon/)** — 447 S Parallel Ave Suite 6A, Ripon, CA 95366 — (209) 637-9779 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Amador Castaneda](https://ctcfinder.com/tester/amador-castaneda-salida/)** — Salida, CA 95368 — (510) 266-9595 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[The Smog GUY](https://ctcfinder.com/tester/the-smog-guy-salida/)** — 5652 Pirrone Rd, Salida, CA 95368 — (209) 812-5206 — 4 mi. Services: OBD testing, motorhome testing.
- **[Amanpreet Singh](https://ctcfinder.com/tester/amanpreet-singh-modesto/)** — Modesto, CA 95356 — (231) 286-0800 — 6 mi. Services: not listed.
- **[Jacob Palleschi](https://ctcfinder.com/tester/jacob-palleschi-modesto/)** — Modesto, CA 95356 — (209) 596-6496 — 6 mi. Services: mobile testing, OBD testing.