---
title: "Mary Lou Ferreira — Clean Truck Check, Galt, CA | CTC Finder"
description: "Mary Lou Ferreira in Galt, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/mary-lou-ferreira-galt/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mary Lou Ferreira

Clean Truck Check tester in Galt, CA (Sacramento 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 | Galt, CA 95632 |
| County | Sacramento County |
| Phone | (916) 803-3575 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mary Lou Ferreira 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 CARB Mobile Diesel Testing in Galt, about 1 mile away. [See listing](https://ctcfinder.com/tester/carb-mobile-diesel-testing-galt/).

## Clean Truck Check testers in Sacramento County

Mary Lou Ferreira is one of 131 testing businesses in Sacramento County on CARB's public tester list. 118 of them offer mobile testing and 71 do smoke opacity tests. In Galt itself there are 7 listed businesses, 7 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 Mary Lou Ferreira offer mobile Clean Truck Check testing?

Yes. Mary Lou Ferreira 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 Mary Lou Ferreira test a 2012 or older diesel truck?

Mary Lou Ferreira does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [CARB Mobile Diesel Testing](https://ctcfinder.com/tester/carb-mobile-diesel-testing-galt/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Mary Lou Ferreira charge for a Clean Truck Check?

Mary Lou Ferreira has not published prices with us; call (916) 803-3575 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 Mary Lou Ferreira a CARB-credentialed tester?

Mary Lou Ferreira 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

- **[AJ's Towing](https://ctcfinder.com/tester/ajs-towing-galt/)** — 10375 Live Oak Ave, Galt, CA 95632 — (916) 222-9889 — 1 mi. Services: mobile testing, motorhome testing.
- **[CARB Mobile Diesel Testing](https://ctcfinder.com/tester/carb-mobile-diesel-testing-galt/)** — 10430 Twin Cities Rd, Galt, CA 95632 — (916) 538-7777 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Galt Smog & Registration](https://ctcfinder.com/tester/galt-smog-and-registration-galt/)** — 515 N Lincoln Way, Galt, CA 95632 — (916) 949-3015 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Gomu Repairs](https://ctcfinder.com/tester/gomu-repairs-galt/)** — Galt, CA 95632 — (209) 331-3462 — 1 mi. Services: mobile testing, OBD testing.
- **[Pamela Cuevas](https://ctcfinder.com/tester/pamela-cuevas-galt/)** — Galt, CA 95632 — (209) 745-5001 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Rick Clement](https://ctcfinder.com/tester/rick-clement-galt/)** — Galt, CA 95632 — (916) 204-8963 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.