---
title: "Semper Mobile Solutions — Clean Truck Check, San Pablo, CA"
description: "Semper Mobile Solutions in San Pablo, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/semper-mobile-solutions-san-pablo/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Semper Mobile Solutions

Clean Truck Check tester in San Pablo, CA (Contra Costa 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 | 1000 Lake St, San Pablo, CA 94806 |
| County | Contra Costa County |
| Phone | (650) 201-6734 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Semper Mobile Solutions 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 Contra Costa County

Semper Mobile Solutions is one of 61 testing businesses in Contra Costa County on CARB's public tester list. 57 of them offer mobile testing and 38 do smoke opacity tests. In San Pablo 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 Semper Mobile Solutions offer mobile Clean Truck Check testing?

Yes. Semper Mobile Solutions 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 Semper Mobile Solutions test a 2012 or older diesel truck?

Yes. Semper Mobile Solutions 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 Semper Mobile Solutions charge for a Clean Truck Check?

Semper Mobile Solutions has not published prices with us; call (650) 201-6734 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 Semper Mobile Solutions a CARB-credentialed tester?

Semper Mobile Solutions 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

- **[Trucking Inc](https://ctcfinder.com/tester/trucking-inc-richmond/)** — 2828 Gonzaga Ave, Richmond, CA 94806 — (209) 737-3137 — 1 mi. Services: mobile testing.
- **[Clean Truck Check](https://ctcfinder.com/tester/clean-truck-check-san-pablo/)** — 1371 23rd St, San Pablo, CA 94806 — (510) 504-7599 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[El Amigo Smog](https://ctcfinder.com/tester/el-amigo-smog-san-pablo/)** — 3024 Giant Rd, San Pablo, CA 94806 — (510) 938-3344 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jonathan Sordine](https://ctcfinder.com/tester/jonathan-sordine-san-pablo/)** — San Pablo, CA 94806 — (510) 241-6894 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Moiz Abdul](https://ctcfinder.com/tester/moiz-abdul-san-pablo/)** — San Pablo, CA 94806 — (916) 508-6393 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Natha &. Yuli Inc.](https://ctcfinder.com/tester/natha-and-yuli-inc-san-pablo/)** — 980 Stanton Ave, San Pablo, CA 94806 — (510) 815-0030 — 1 mi. Services: mobile testing, OBD testing.