---
title: "Clean Truck Check Testers in San Luis Obispo County, CA (25)"
description: "25 CARB-credentialed Clean Truck Check testers in San Luis Obispo County, California, across 11 cities. 22 offer mobile testing. Search by city, see phone…"
url: "https://ctcfinder.com/testers/san-luis-obispo-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in San Luis Obispo County, California

25 testing businesses in 11 cities; 22 offer mobile testing, 9 do smoke opacity tests, 21 test motorhomes.

> 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.

## City pages

- [Atascadero](https://ctcfinder.com/testers/san-luis-obispo-county/atascadero/) — 6 listings
- [Paso Robles](https://ctcfinder.com/testers/san-luis-obispo-county/paso-robles/) — 5 listings
- [San Luis Obispo](https://ctcfinder.com/testers/san-luis-obispo-county/san-luis-obispo/) — 4 listings
- [Nipomo](https://ctcfinder.com/testers/san-luis-obispo-county/nipomo/) — 3 listings

## Arroyo Grande

- **[Eduardo Garibay](https://ctcfinder.com/tester/eduardo-garibay-arroyo-grande/)** — Arroyo Grande, CA 93420 — (805) 723-4318. Services: mobile testing, OBD testing.

## Morro Bay

- **[MAFFEIS Automotive](https://ctcfinder.com/tester/maffeis-automotive-morro-bay/)** — 1700 Park St, Morro Bay, CA 93442 — (805) 369-9222. Services: OBD testing, motorhome testing.

## Oceano

- **[Beach Front Auto & Smog](https://ctcfinder.com/tester/beach-front-auto-and-smog-oceano/)** — 1210 Pike Ln, Oceano, CA 93445 — (805) 878-2620. Services: OBD testing, motorhome testing.

## Pismo Beach

- **[Miller's 76](https://ctcfinder.com/tester/millers-76-pismo-beach/)** — 542 Five Cities Dr, Pismo Beach, CA 93449 — (805) 773-5727. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Santa Margarita

- **[Connor Whiteford](https://ctcfinder.com/tester/connor-whiteford-santa-margarita/)** — Santa Margarita, CA 93453 — (805) 441-3085. Services: mobile testing, OBD testing, motorhome testing.

## Shandon

- **[Carroll's Automotive Repair](https://ctcfinder.com/tester/carrolls-automotive-repair-shandon/)** — 280 S 1st St, Shandon, CA 93461 — (805) 610-9586. Services: mobile testing, OBD testing, motorhome testing.

## Templeton

- **[Mtech Unlimited](https://ctcfinder.com/tester/mtech-unlimited-templeton/)** — Templeton, CA 93465 — (805) 550-8744. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.


## Frequently asked questions

### How many Clean Truck Check testers are in San Luis Obispo County?

CTC Finder lists 25 testing businesses in San Luis Obispo County from CARB's public tester list (25 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher.

### Is there mobile Clean Truck Check testing in San Luis Obispo County?

Yes. 22 listed businesses in San Luis Obispo County offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them.

### How much does a Clean Truck Check test cost in San Luis Obispo County?

Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/).