---
title: "MAFFEIS Automotive — Clean Truck Check, Morro Bay, CA"
description: "MAFFEIS Automotive in Morro Bay, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/maffeis-automotive-morro-bay/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# MAFFEIS Automotive

Clean Truck Check tester in Morro Bay, CA (San Luis Obispo 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 | 1700 Park St, Morro Bay, CA 93442 |
| County | San Luis Obispo County |
| Phone | (805) 369-9222 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks MAFFEIS 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Affordable Auto Care in Atascadero, about 8 miles away. [See listing](https://ctcfinder.com/tester/affordable-auto-care-atascadero/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Affordable Auto Care in Atascadero, about 8 miles away. [See listing](https://ctcfinder.com/tester/affordable-auto-care-atascadero/).

## Clean Truck Check testers in San Luis Obispo County

MAFFEIS Automotive is one of 25 testing businesses in San Luis Obispo County on CARB's public tester list. 22 of them offer mobile testing and 9 do smoke opacity tests.

## 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 MAFFEIS Automotive offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Affordable Auto Care](https://ctcfinder.com/tester/affordable-auto-care-atascadero/) (about 8 miles).

### Can MAFFEIS Automotive test a 2012 or older diesel truck?

MAFFEIS Automotive does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Affordable Auto Care](https://ctcfinder.com/tester/affordable-auto-care-atascadero/) (about 8 miles). Trucks from 2013 on get an OBD scan instead.

### How much does MAFFEIS Automotive charge for a Clean Truck Check?

MAFFEIS Automotive has not published prices with us; call (805) 369-9222 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 MAFFEIS Automotive a CARB-credentialed tester?

MAFFEIS 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

- **[Affordable Auto Care](https://ctcfinder.com/tester/affordable-auto-care-atascadero/)** — 4495 Traffic Way, Atascadero, CA 93422 — (805) 258-1495 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Bennett Diesel Repair](https://ctcfinder.com/tester/bennett-diesel-repair-atascadero/)** — 3355 Chico Rd, Atascadero, CA 93422 — (805) 423-6132 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Darrell Dillard](https://ctcfinder.com/tester/darrell-dillard-atascadero/)** — Atascadero, CA 93422 — (805) 674-8110 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[GK's Clean Truck](https://ctcfinder.com/tester/gks-clean-truck-atascadero/)** — 1500 N Ferrocarril Rd, Atascadero, CA 93422 — (805) 538-4991 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jeff's Auto Works](https://ctcfinder.com/tester/jeffs-auto-works-atascadero/)** — 9000 El Camino Real, Atascadero, CA 93422 — (805) 459-7830 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Specialized Equipment Repair](https://ctcfinder.com/tester/specialized-equipment-repair-atascadero/)** — 9005 El Camino Real, Atascadero, CA 93422 — (805) 466-1066 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.