---
title: "Alex Lopez — Clean Truck Check, Watsonville, CA | CTC Finder"
description: "Alex Lopez in Watsonville, 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/alex-lopez-watsonville/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Alex Lopez

Clean Truck Check tester in Watsonville, CA (Santa Cruz 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 | Watsonville, CA 95076 |
| County | Santa Cruz County |
| Phone | (831) 566-1827 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Alex Lopez 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 Santa Cruz County

Alex Lopez is one of 18 testing businesses in Santa Cruz County on CARB's public tester list. 15 of them offer mobile testing and 6 do smoke opacity tests. In Watsonville itself there are 10 listed businesses, 8 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 Alex Lopez offer mobile Clean Truck Check testing?

Yes. Alex Lopez 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 Alex Lopez test a 2012 or older diesel truck?

Yes. Alex Lopez 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 Alex Lopez charge for a Clean Truck Check?

Alex Lopez has not published prices with us; call (831) 566-1827 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 Alex Lopez a CARB-credentialed tester?

Alex Lopez 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

- **[Betos mobile & truck services LLC](https://ctcfinder.com/tester/betos-mobile-and-truck-services-llc-royal-oaks/)** — 415 Hall Rd, Royal Oaks, CA 95076 — (831) 247-0392 — 1 mi. Services: mobile testing, OBD testing.
- **[Best Service Automotive & Truck Repair](https://ctcfinder.com/tester/best-service-automotive-and-truck-repair-watsonville/)** — 18 Walker St, Watsonville, CA 95076 — (831) 353-1533 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Crafton’s smog check](https://ctcfinder.com/tester/craftons-smog-check-watsonville/)** — 771 Freedom Blvd, Watsonville, CA 95076 — (831) 227-3766 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Daniel Dye](https://ctcfinder.com/tester/daniel-dye-watsonville/)** — Watsonville, CA 95076 — (831) 713-8935 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Easy Tune Up 95$](https://ctcfinder.com/tester/easy-tune-up-95-watsonville/)** — 469 Union St, Watsonville, CA 95076 — (831) 535-8373 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Juan Calles](https://ctcfinder.com/tester/juan-calles-watsonville/)** — Watsonville, CA 95076 — (831) 212-5327 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.