---
title: "Steven D Phillips — Clean Truck Check, Castro Valley, CA"
description: "Steven D Phillips in Castro Valley, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/steven-d-phillips-castro-valley/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Steven D Phillips

Clean Truck Check tester in Castro Valley, CA (Alameda 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 | Castro Valley, CA 94546 |
| County | Alameda County |
| Phone | (510) 435-0859 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Steven D Phillips 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 | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Roadway mobile truck services in San Leandro, about 3 miles away. [See listing](https://ctcfinder.com/tester/roadway-mobile-truck-services-san-leandro/).

## Clean Truck Check testers in Alameda County

Steven D Phillips is one of 85 testing businesses in Alameda County on CARB's public tester list. 79 of them offer mobile testing and 37 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 Steven D Phillips offer mobile Clean Truck Check testing?

Yes. Steven D Phillips 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 Steven D Phillips test a 2012 or older diesel truck?

Steven D Phillips does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Roadway mobile truck services](https://ctcfinder.com/tester/roadway-mobile-truck-services-san-leandro/) (about 3 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Steven D Phillips charge for a Clean Truck Check?

Steven D Phillips has not published prices with us; call (510) 435-0859 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 Steven D Phillips a CARB-credentialed tester?

Steven D Phillips 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

- **[Jaime Morales](https://ctcfinder.com/tester/jaime-morales-san-leandro/)** — San Leandro, CA 94578 — (650) 219-2225 — 3 mi. Services: mobile testing, OBD testing.
- **[Mobile Golden State Emissions San Leandro](https://ctcfinder.com/tester/mobile-golden-state-emissions-san-leandro-san-leandro/)** — 15267 Hesperian Blvd., San Leandro, CA 94578 — (925) 818-1831 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Roadway mobile truck services](https://ctcfinder.com/tester/roadway-mobile-truck-services-san-leandro/)** — 1516 162nd Ave, San Leandro, CA 94578 — (510) 213-2967 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Yazid Kahil](https://ctcfinder.com/tester/yazid-kahil-san-leandro/)** — San Leandro, CA 94578 — (510) 520-3051 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jerome Moore](https://ctcfinder.com/tester/jerome-moore-oakland/)** — Oakland, CA 94603 — (510) 857-2778 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[King Fleet](https://ctcfinder.com/tester/king-fleet-oakland/)** — 72 98th Ave, Oakland, CA 94603 — (510) 990-7954 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.