---
title: "Marcelo Mendoza — Clean Truck Check, Tracy, CA | CTC Finder"
description: "Marcelo Mendoza in Tracy, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/marcelo-mendoza-tracy/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Marcelo Mendoza

Clean Truck Check tester in Tracy, 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 | Tracy, CA 95391 |
| County | San Joaquin County |
| Phone | (925) 352-0590 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Marcelo Mendoza 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

Marcelo Mendoza 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 Tracy itself there are 21 listed businesses, 20 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 Marcelo Mendoza offer mobile Clean Truck Check testing?

Yes. Marcelo Mendoza 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 Marcelo Mendoza test a 2012 or older diesel truck?

Yes. Marcelo Mendoza 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 Marcelo Mendoza charge for a Clean Truck Check?

Marcelo Mendoza has not published prices with us; call (925) 352-0590 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 Marcelo Mendoza a CARB-credentialed tester?

Marcelo Mendoza 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

- **[AAA Golden State Emissions Testing](https://ctcfinder.com/tester/aaa-golden-state-emissions-testing-discovery-bay/)** — 2115 Bridgeport Loop, Discovery Bay, CA 94505 — (925) 354-4370 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[A1 Smog Center](https://ctcfinder.com/tester/a1-smog-center-livermore/)** — 3573 First St Suite E, Livermore, CA 94551 — (510) 584-8200 — 9 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Aabco Automotive Repair](https://ctcfinder.com/tester/aabco-automotive-repair-livermore/)** — 1200 Portola Ave, Livermore, CA 94551 — (510) 421-8872 — 9 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Eric Khlaut](https://ctcfinder.com/tester/eric-khlaut-livermore/)** — Livermore, CA 94551 — (925) 206-2004 — 9 mi. Services: not listed.
- **[Mobile Golden State Emissions Testing](https://ctcfinder.com/tester/mobile-golden-state-emissions-testing-livermore/)** — 796 Laurel Dr, Livermore, CA 94551 — (925) 354-4370 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mobile Wrenching](https://ctcfinder.com/tester/mobile-wrenching-livermore/)** — 903 Ventura Ct, Livermore, CA 94551 — (925) 525-2673 — 9 mi. Services: mobile testing, OBD testing, motorhome testing.